swan canning catchments data report · 2016-08-25 · swan canning catchment data report january...

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Swan Canning catchments data report

4th Quarter: January - December 2015

Looking after all our water needs

Department of Water Technical Report prepared for the Department of Parks and

Wildlife, Rivers and Estuaries Division

May 2016

Department of Water

168 St Georges Terrace

Perth, Western Australia 6000

Telephone +61 8 6364 7600

Facsimile +61 8 6364 7601

www.water.wa.gov.au

© Government of Western Australia 2016

May 2016

This work is copyright. You may download, display, print and reproduce

this material in unaltered form only (retaining this notice) for your personal, non-

commercial use or use within your organisation. Apart from any use as permitted

under the Copyright Act 1968, all other rights are reserved. Requests and inquiries

concerning reproduction and rights should be addressed to the Department of Water.

Acknowledgements

This project was funded by the Government of Western Australia through the

Department of Parks and Wildlife Rivers and Estuaries Division and the Department

of Water.

For more information about this report, contact:

Dominic Heald (Environmental Officer),

Water Science Branch.

Swan Canning Catchment Data Report January – December 2015

Department of Water 3

Contents Preface ...................................................................................................................... 13

Summary ................................................................................................................... 19

1 Avon R (SWN5) ................................................................................................ 21

2 Bannister Ck (SWS2) ........................................................................................ 29

3 Bayswater MD (SWS10) ................................................................................... 36

4 Bennett Bk (SWN12) ........................................................................................ 44

5 Bickley Bk (SWS4) ............................................................................................ 52

6 Blackadder Ck (SWN8) ..................................................................................... 60

7 Canning R (SWS12) ......................................................................................... 67

8 Ellen Bk (SWN3) ............................................................................................... 75

9 Helena R (SWN10) ........................................................................................... 83

10 Jane Bk (SWN7) ............................................................................................... 91

11 Mills Street MD (SWS1) .................................................................................... 99

12 S. Belmont MD (SWS13) ................................................................................ 107

13 Southern R (SWS7) ........................................................................................ 115

14 Susannah Bk (SWN11) ................................................................................... 123

15 Yule Bk (SWS3) .............................................................................................. 131

16 SWANCATCH/SCWQIP data comparison ...................................................... 139

17 Perth rainfall.................................................................................................... 141

Tables

Table 1 SWANCATCH Swan and Canning Catchment site coordinates. ................................... 15

Table 2 SCWQIP Swan and Canning Catchment site coordinates. ............................................ 16

Table 3 Swan and Canning Catchment sampling regime. .......................................................... 18

Table 4 2015 monthly sample numbers, minimum and maximum values at site SWN5 (Avon R). ......................................................................................................................... 27

Table 5 2015 monthly sample numbers, minimum and maximum values at SWS2 (Bannister Ck). ................................................................................................................ 34

Table 6 2015 monthly sample numbers, minimum and maximum values at SWS10 (Bayswater MD). ............................................................................................................. 42

Table 7 2015 monthly sample numbers, minimum and maximum values at SWN12 (Bennett Bk). ................................................................................................................... 50

Table 8 2015 monthly sample numbers, minimum and maximum values at SWS4 (Bickley Bk). .................................................................................................................................. 58

Table 9 2015 monthly sample numbers, minimum and maximum values at SWN8 (Blackadder ..................................................................................................................... 65

Table 10 2015 monthly sample numbers, minimum and maximum values at SWS12 (Canning R)..................................................................................................................... 73


4 Department of Water

Table 11 2015 monthly sample numbers, minimum and maximum values at SWN3 (Ellen Bk). .................................................................................................................................. 81

Table 12 2015 monthly sample numbers, minimum and maximum values at SWN10 (Helena R)....................................................................................................................... 89

Table 13 2015 monthly sample numbers, minimum and maximum values at SWN7 (Jane Bk). .................................................................................................................................. 97

Table 14 2015 monthly sample numbers, minimum and maximum values at SWS1 (Mills St MD). .............................................................................................................................. 105

Table 15 2015 monthly sample numbers, minimum and maximum values at SWS13 (S. Belmont MD). ................................................................................................................ 113

Table 16 2015 monthly sample numbers, minimum and maximum values at SWS7 (Southern R). ................................................................................................................ 121

Table 17 2015 monthly sample numbers, minimum and maximum values at SWN11 (Susannah Bk). ............................................................................................................. 129

Table 18 2015 monthly sample numbers, minimum and maximum values at SWS3 (Yule Bk). ................................................................................................................................ 137

Table 19 2015 first, second, third & fourth quarters (Jan - Dec) mean ± standard deviation for all SWANCATCH (bold font) and SCWQIP (regular font) sites. .............................. 139

Figures

Figure 1 Map of Swan and Canning Catchment routine monitoring sites. ................................... 17

Figure 2 2015 Total Nitrogen (TN) (mg L-1

) monthly medians over 2010-2014 monthly box plots of median, 25

th, 75

th, 10

th and 90

th percentiles, at site SWN5 (Avon R). ............... 21

Figure 3 2015 Ammonium Nitrogen (NH3-N) (mg L-1


th, 75

th, 10

th and 90

th percentiles, at site SWN5

(Avon R). ......................................................................................................................... 21

Figure 4 2015 Total Oxidised Nitrogen (NOx-N) (mg L-1


th, 75

th, 10

th and 90


(Avon R). ......................................................................................................................... 22

Figure 5 2015 Dissolved Organic Nitrogen (DOrgN) (mg L-1


th, 75

th, 10

th and 90

th percentiles, at site

SWN5 (Avon R). ............................................................................................................. 22

Figure 6 2015 Total Phosphorus (TP) (mg L-1


th, 75

th, 10

th and 90

th percentiles, at site SWN5 (Avon R). ......... 23

Figure 7 2015 Soluble Reactive Phosphorus (SRP) (mg L-1


th, 75

th, 10

th and 90


SWN5 (Avon R). ............................................................................................................. 23

Figure 8 2015 Dissolved Organic Carbon (DOC) (mg L-1


th, 75

th, 10

th and 90


SWN5 (Avon R). ............................................................................................................. 24

Figure 9 2015 Total Suspended Solids (TSS) (mg L-1


th, 75

th, 10

th and 90


(Avon R). ......................................................................................................................... 24

Figure 10 2015 Dissolved Oxygen (DO) (mg L-1


th, 75

th, 10

th and 90


Figure 11 2015 Specific Conductivity (mS cm-1


th, 75

th, 10

th and 90


Figure 12 2015 Avon R flow at Walyunga (616011) – Daily discharge hydrograph measured in megalitres.................................................................................................................... 26



th, 75

th, 10

th and 90

th percentiles, at site SWS2 (Bannister Ck). ....... 29





th, 75

th, 10

th and 90

th percentiles, at site SWS2

(Bannister Ck). ................................................................................................................ 29



th, 75

th, 10

th and 90

th percentiles, at SWS2

(Bannister Ck). ................................................................................................................ 30



th, 75

th, 10

th and 90


(Bannister Ck). ................................................................................................................ 30



th, 75

th, 10

th and 90

th percentiles, at site SWS2 (Bannister

Ck). ................................................................................................................................. 31



th, 75

th, 10

th and 90


(Bannister Ck). ................................................................................................................ 31



th, 75

th, 10

th and 90


(Bannister Ck). ................................................................................................................ 32



th, 75

th, 10

th and 90


(Bannister Ck). ................................................................................................................ 32



th, 75

th, 10

th and 90


Ck). ................................................................................................................................. 33



th, 75

th, 10

th and 90


Ck). ................................................................................................................................. 33



th, 75

th, 10

th and 90

th percentiles, at site SWS10 (Bayswater

MD). ................................................................................................................................ 36



th, 75

th, 10

th and 90


(Bayswater MD). ............................................................................................................. 36



th, 75

th, 10

th and 90


(Bayswater MD). ............................................................................................................. 37



th, 75

th, 10

th and 90


(Bayswater MD). ............................................................................................................. 37



th, 75

th, 10

th and 90


(Bayswater MD). ............................................................................................................. 38



th, 75

th, 10

th and 90


(Bayswater MD). ............................................................................................................. 38



th, 75

th, 10

th and 90


(Bayswater MD). ............................................................................................................. 39



th, 75

th, 10

th and 90


(Bayswater MD). ............................................................................................................. 39



th, 75

th, 10

th and 90


(Bayswater MD). ............................................................................................................. 40





th, 75

th, 10

th and 90


(Bayswater MD). ............................................................................................................. 40

Figure 33 2015 Bayswater MD flow (616082) – Daily discharge hydrograph measured in megalitres ....................................................................................................................... 41



th, 75

th, 10

th and 90

th percentiles, at site SWN12 (Bennett Bk)......... 44



th, 75

th, 10

th and 90


(Bennett Bk). ................................................................................................................... 44



th, 75

th, 10

th and 90

th percentiles, at SWN12

(Bennett Bk). ................................................................................................................... 45



th, 75

th, 10

th and 90


(Bennett Bk). ................................................................................................................... 45



th, 75

th, 10

th and 90

th percentiles, at site SWN12 (Bennett

Bk). .................................................................................................................................. 46



th, 75

th, 10

th and 90


(Bennett Bk). ................................................................................................................... 46



th, 75

th, 10

th and 90


(Bennett Bk). ................................................................................................................... 47



th, 75

th, 10

th and 90


(Bennett Bk). ................................................................................................................... 47



th, 75

th, 10

th and 90


Bk). .................................................................................................................................. 48



th, 75

th, 10

th and 90


Bk). .................................................................................................................................. 48

Figure 44 2015 Bennett Bk flow (616084) – Daily discharge hydrograph measured in megalitres ....................................................................................................................... 49



th, 75

th, 10

th and 90

th percentiles, at site SWS4 (Bickley Bk). ........... 52



th, 75

th, 10

th and 90


(Bickley Bk). .................................................................................................................... 52



th, 75

th, 10

th and 90


(Bickley Bk). .................................................................................................................... 53



th, 75

th, 10

th and 90


(Bickley Bk). .................................................................................................................... 53



th, 75

th, 10

th and 90

th percentiles, at site SWS4 (Bickley

Bk). .................................................................................................................................. 54



th, 75

th, 10

th and 90


(Bickley Bk). .................................................................................................................... 54





th, 75

th, 10

th and 90


(Bickley Bk). .................................................................................................................... 55



th, 75

th, 10

th and 90


(Bickley Bk). .................................................................................................................... 55



th, 75

th, 10

th and 90


Bk). .................................................................................................................................. 56



th, 75

th, 10

th and 90


Bk). .................................................................................................................................. 56

Figure 55 2015 Bickley Bk flow (616047) – Daily discharge hydrograph measured in megalitres ....................................................................................................................... 57



th, 75

th, 10

th and 90

th percentiles, at site SWN8 (Blackadder

Ck). ................................................................................................................................. 60



th, 75

th, 10

th and 90


(Blackadder Ck). ............................................................................................................. 60



th, 75

th, 10

th and 90


(Blackadder Ck). ............................................................................................................. 61



th, 75

th, 10

th and 90


(Blackadder Ck). ............................................................................................................. 61



th, 75

th, 10

th and 90


(Blackadder Ck). ............................................................................................................. 62



th, 75

th, 10

th and 90


(Blackadder Ck). ............................................................................................................. 62



th, 75

th, 10

th and 90


(Blackadder Ck). ............................................................................................................. 63



th, 75

th, 10

th and 90


(Blackadder Ck). ............................................................................................................. 63



th, 75

th, 10

th and 90


(Blackadder Ck). ............................................................................................................. 64



th, 75

th, 10

th and 90


(Blackadder Ck). ............................................................................................................. 64



th, 75

th, 10

th and 90

th percentiles, at site SWS12 (Canning R). ........ 67



th, 75

th, 10

th and 90


(Canning R)..................................................................................................................... 67



th, 75

th, 10

th and 90


(Canning R)..................................................................................................................... 68



th, 75

th, 10

th and 90


(Canning R)..................................................................................................................... 68





th, 75

th, 10

th and 90

th percentiles, at site SWS12 (Canning

R). ................................................................................................................................... 69



th, 75

th, 10

th and 90


(Canning R)..................................................................................................................... 69



th, 75

th, 10

th and 90


(Canning R)..................................................................................................................... 70



th, 75

th, 10

th and 90


(Canning R)..................................................................................................................... 70



th, 75

th, 10

th and 90

th percentiles, at site SWS12 (Canning). ..... 71



th, 75

th, 10

th and 90

th percentiles, at site SWS12 (Canning

R). ................................................................................................................................... 71

Figure 76 2015 Canning River flow (616027) – Daily discharge hydrograph measured in megalitres ....................................................................................................................... 72



th, 75

th, 10

th and 90

th percentiles, at site SWN3 (Ellen Bk). .............. 75



th, 75

th, 10

th and 90


(Ellen Bk). ....................................................................................................................... 75



th, 75

th, 10

th and 90

th percentiles, at SWN3 (Ellen

Bk). .................................................................................................................................. 76



th, 75

th, 10

th and 90


(Ellen Bk). ....................................................................................................................... 76



th, 75

th, 10

th and 90

th percentiles, at site SWN3 (Ellen Bk). ....... 77



th, 75

th, 10

th and 90


(Ellen Bk). ....................................................................................................................... 77



th, 75

th, 10

th and 90


(Ellen Bk). ....................................................................................................................... 78



th, 75

th, 10

th and 90


(Ellen Bk). ....................................................................................................................... 78



th, 75

th, 10

th and 90




th, 75

th, 10

th and 90


Figure 87 2015 Ellen Bk flow (616189) – Daily discharge hydrograph measured in megalitres ....................................................................................................................... 80



th, 75

th, 10

th and 90

th percentiles, at site SWN10 (Helena R). .......... 83



th, 75

th, 10

th and 90


(Helena R)....................................................................................................................... 83



th, 75

th, 10

th and 90


(Helena R)....................................................................................................................... 84





th, 75

th, 10

th and 90


(Helena R)....................................................................................................................... 84



th, 75

th, 10

th and 90

th percentiles, at site SWN10 (Helena

R). ................................................................................................................................... 85



th, 75

th, 10

th and 90


(Helena R)....................................................................................................................... 85



th, 75

th, 10

th and 90


(Helena R)....................................................................................................................... 86



th, 75

th, 10

th and 90


(Helena R)....................................................................................................................... 86



th, 75

th, 10

th and 90


R). ................................................................................................................................... 87



th, 75

th, 10

th and 90


R). ................................................................................................................................... 87

Figure 98 2015 Helena R flow (616086) – Daily discharge hydrograph measured in megalitres ....................................................................................................................... 88



th, 75

th, 10

th and 90

th percentiles, at site SWN7 (Jane Bk). .............. 91



th, 75

th, 10

th and 90


(Jane Bk)......................................................................................................................... 91



th, 75

th, 10

th and 90

th percentiles, at SWN7 (Jane

Bk). .................................................................................................................................. 92



th, 75

th, 10

th and 90


(Jane Bk)......................................................................................................................... 92



th, 75

th, 10

th and 90

th percentiles, at site SWN7 (Jane Bk). ....... 93



th, 75

th, 10

th and 90


(Jane Bk)......................................................................................................................... 93



th, 75

th, 10

th and 90


(Jane Bk)......................................................................................................................... 94



th, 75

th, 10

th and 90


(Jane Bk)......................................................................................................................... 94



th, 75

th, 10

th and 90




th, 75

th, 10

th and 90


Figure 109 2015 Jane Bk flow (616088) – Daily discharge hydrograph measured in megalitres ....................................................................................................................... 96



th, 75

th, 10

th and 90

th percentiles, at site SWS1 (Mills St MD). ......... 99





th, 75

th, 10

th and 90


(Mills St MD). .................................................................................................................. 99



th, 75

th, 10

th and 90

th percentiles, at SWS1 (Mills

St MD). .......................................................................................................................... 100



th, 75

th, 10

th and 90


(Mills St MD). ................................................................................................................ 100



th, 75

th, 10

th and 90

th percentiles, at site SWS1 (Mills St

MD). .............................................................................................................................. 101



th, 75

th, 10

th and 90


(Mills St MD). ................................................................................................................ 101



th, 75

th, 10

th and 90


(Mills St MD). ................................................................................................................ 102



th, 75

th, 10

th and 90


(Mills St MD). ................................................................................................................ 102



th, 75

th, 10

th and 90


MD). .............................................................................................................................. 103



th, 75

th, 10

th and 90


MD). .............................................................................................................................. 103

Figure 120 2015 Mills St MD flow (616043) – Daily discharge hydrograph measured in megalitres ..................................................................................................................... 104



th, 75

th, 10

th and 90

th percentiles, at site SWS13 (S. Belmont

MD). .............................................................................................................................. 107



th, 75

th, 10

th and 90


(S. Belmont MD). .......................................................................................................... 107



th, 75

th, 10

th and 90

th percentiles, at SWS13 (S.

Belmont MD). ................................................................................................................ 108



th, 75

th, 10

th and 90


(S. Belmont MD). .......................................................................................................... 108



th, 75

th, 10

th and 90

th percentiles, at site SWS13 (S.

Belmont MD). ................................................................................................................ 109



th, 75

th, 10

th and 90


(S. Belmont MD). .......................................................................................................... 109



th, 75

th, 10

th and 90


(S. Belmont MD). .......................................................................................................... 110



th, 75

th, 10

th and 90


(S. Belmont MD). .......................................................................................................... 110



th, 75

th, 10

th and 90


Belmont MD). ................................................................................................................ 111





th, 75

th, 10

th and 90


Belmont MD). ................................................................................................................ 111

Figure 131 2015 S. Belmont MD flow (616133) – Daily discharge hydrograph measured in megalitres ..................................................................................................................... 112



th, 75

th, 10

th and 90

th percentiles, at site SWS7 (Southern R). ....... 115



th, 75

th, 10

th and 90


(Southern R). ................................................................................................................ 115



th, 75

th, 10

th and 90


(Southern R). ................................................................................................................ 116



th, 75

th, 10

th and 90


(Southern R). ................................................................................................................ 116



th, 75

th, 10

th and 90

th percentiles, at site SWS7 (Southern

R). ................................................................................................................................. 117



th, 75

th, 10

th and 90


(Southern R). ................................................................................................................ 117



th, 75

th, 10

th and 90


(Southern R). ................................................................................................................ 118



th, 75

th, 10

th and 90


(Southern R). ................................................................................................................ 118



th, 75

th, 10

th and 90


R). ................................................................................................................................. 119



th, 75

th, 10

th and 90


R). ................................................................................................................................. 119

Figure 142 2015 Southern R flow (616092) – Daily discharge hydrograph measured in megalitres ..................................................................................................................... 120



th, 75

th, 10

th and 90

th percentiles, at site SWN11 (Susannah

Bk). ................................................................................................................................ 123



th, 75

th, 10

th and 90


(Susannah Bk). ............................................................................................................. 123



th, 75

th, 10

th and 90


(Susannah Bk). ............................................................................................................. 124



th, 75

th, 10

th and 90


(Susannah Bk). ............................................................................................................. 124



th, 75

th, 10

th and 90


(Susannah Bk). ............................................................................................................. 125



th, 75

th, 10

th and 90


(Susannah Bk). ............................................................................................................. 125





th, 75

th, 10

th and 90


(Susannah Bk). ............................................................................................................. 126



th, 75

th, 10

th and 90


(Susannah Bk). ............................................................................................................. 126



th, 75

th, 10

th and 90


(Susannah Bk). ............................................................................................................. 127



th, 75

th, 10

th and 90


(Susannah Bk). ............................................................................................................. 127

Figure 153 2015 Susannah Bk flow (616099) – Daily discharge hydrograph measured in megalitres ..................................................................................................................... 128



th, 75

th, 10

th and 90

th percentiles, at site SWS3 (Yule Bk). ............. 131



th, 75

th, 10

th and 90


(Yule Bk). ...................................................................................................................... 131



th, 75

th, 10

th and 90

th percentiles, at SWS3 (Yule

Bk). ................................................................................................................................ 132



th, 75

th, 10

th and 90


(Yule Bk). ...................................................................................................................... 132



th, 75

th, 10

th and 90

th percentiles, at site SWS3 (Yule Bk). ...... 133



th, 75

th, 10

th and 90


(Yule Bk). ...................................................................................................................... 133



th, 75

th, 10

th and 90


(Yule Bk). ...................................................................................................................... 134



th, 75

th, 10

th and 90


(Yule Bk). ...................................................................................................................... 134



th, 75

th, 10

th and 90




th, 75

th, 10

th and 90


Figure 164 2015 Yule Bk flow (616042) – Daily discharge hydrograph measured in megalitres ..................................................................................................................... 136

Figure 165 Perth’s rainfall 1st January 2010 to 31

st December 2015. ............................................. 141



Preface

The Swan Canning Environmental Monitoring and Reporting project is a long term

monitoring project consisting of regular sampling of the Swan and Canning Rivers

and selected tributaries within their catchments, enabling regular water quality

reporting and annual reporting on estuarine and catchment compliance against long

and short term targets. The project was initially designed and implemented in 1994

by the Swan River Trust and Department of Water (then Water and Rivers

Commission). The project currently falls under the Department of Parks and Wildlife's

River Protection Strategy and is jointly operated by the Water Science Branch of the

Department of Water and the Department of Parks and Wildlife.

The sampling conducted for this project is captured under the Department of Water

WIN data management project SG-C-SWANCATCH, consisting of fortnightly

sampling of sixteen sites.

In March 2010 a second catchment sampling project was implemented to address

gaps in previous monitoring and to provide data for predictive modelling of the Swan

Canning Catchment. This project consists of fortnightly sampling of sixteen sites and

falls under the Department of Water project SG-C-SCWQIP (Swan Canning Water

Quality Improvement Plan). Note that this sampling project was initially run from

January 2007 to June 2008 as SG-C-SWANCCI but was closed due to limited

funding.

Some important changes to the SWANCATCH and SCWQIP projects are listed

below:

• Changed from weekly to fortnightly sampling in 2001.

• Changed from specific conductivity (compensated at 25°C) to uncompensated conductivity in October 2001 and back to specific conductivity (compensated at 25°C) in September 2006.

• Added parameters Dissolved oxygen and pH in September 2006 (changed instrument from WTW to Quanta).

• Added parameters Dissolved organic nitrogen and Total organic carbon in October 2006. Total organic carbon only sampled to July 2008.

• October 2006 Canning River site moved ~500 m downstream from McKenzie Grove to Seaforth for better site access and to align with location of gauging station.

• October 2006 extra Ellen Brook site (EBAC) added to regular sampling near confluence with Avon River. Stopped sampling March 2009 due to site access issues. Site location changed to West Swan Road Bridge (SWN9) and sampling restarted March 2010.

• April 2011 SCWQIP Claise Brook site moved from SCCIN5 to CB13.



• May 2011 South Belmont Main Drain site moved ~100 m upstream from SWS11 (Great Eastern Hwy) to SWS13 (Severin Walk, Abernathy Rd) due to tidal influence at the old site (SWS11). The gauging station has also been moved (~750 m upstream to Cleaver Terrace).

• The Wandoo Creek catchment site was moved downstream to WNDCK (August 2011) as the former site, SCCIN4, was almost always dry, even in winter.

• From April 2012 onwards the SCWQIP sites list was modified and now consists of 16 sites (down from 17); four of which are new sites selected after a period of expanded monitoring where 36 sites were monitored for nine months (Aug 2011 to March 2012).



Table 1 SWANCATCH Swan and Canning Catchment site coordinates.

Swan-Canning Sub catchment

Site Site Code

Easting Northing Flow

Status

Mills Street Main Drain

Mills St Main Drain, Palm Place, Cannington

SWS1 397944 6457220 Continuous

Bannister Creek Bannister Creek, Hybanthus Rd, Ferndale


Yule Brook Yule Brook, Brixton St SWS3 402466 6456282 Ephemeral

Bickley Brook Bickley Brook Main Drain, Austin Ave, Kenwick

SWS4 403329 6454317 Ephemeral

Upper Canning River

Canning River, Seaforth, Gosnells


Southern River Southern River, Anaconda Drive, Huntingdale


Bayswater Main Drain

Bayswater Main Drain, Slade St, Bayswater


South Belmont Main Drain

South Belmont Main Drain, Severin Walk, Abernathy Road, Belmont


Ellen Brook

Ellen Brook, Almeria Pde, Upper Swan

SWN3 407640 6486742 Ephemeral

Ellen Brook Bridge, West Swan Road, Upper Swan


Avon River (Millendon)

Swan River, Upper Swan Bridge, Great Northern Highway

SWN5 407488 6483347 Continuous

Jane Brook Jane Brook, Sweeting Bridge, Great Northern Highway, Middle Swan


Blackadder Creek

Blackadder Creek, Francis Street, Midland


Helena River Helena River, Whiteman Rd


Susannah Brook Susannah Brook, River Rd SWN11 406686 6479346 Ephemeral

Bennett Brook Bennett Brook, Brook Rd SWN12 401583 6473636 Continuous



Table 2 SCWQIP Swan and Canning Catchment site coordinates.

Swan-Canning Sub catchment

Site Site Code Easting Northing Flow

Status

South Perth Galway Rd, Manning

Wilson Main Drain

SCCIS1

WIFRD

394510

397532

6457040

6456807

Continuous

Continuous

Bull Creek Beatrice Ave Main Drain

Holmes St, Shelley

BAMDKD

SCCIS2

394601

394994

6455139

6455765

Continuous

Continuous

Lower Canning Cockram St Drain, Grose Av, Cannington

SCCIS3 400130 6457259 Continuous

Helm Street Drain

Helm St Drain, Maddington SCCIS4 405288 6452862 Ephemeral

Ellis Brook Ellis Brook, Mills St, Maddington

EBGS01 405822 6451830 Ephemeral

Southern River Neerigen Brook, Armadale AW05 405936 6442203 Ephemeral

Perth Airport South Drain

Perth Airport Drain, Second Ave, Redcliffe


Perth Airport North Drain

Limestone Creek, Great Eastern Hwy Bypass


Henley Brook Henley Brook, Brockman St

HBBROCK 405664 6480723 Ephemeral

Saint Leonards Creek

George St access, West Swan

SCCIN3 405159 6477205 Ephemeral

Upper Swan

Chapman St drain, Ashfield CSMDREID 400699 6468584 Continuous

Wandoo Creek, West Swan

WNDCK 404655 6475967 Ephemeral

Maylands Maylands/Inglewood Main Drain

MIMDOUT 395191 6466023 Continuous

Claise Brook Main Drain

Claise Brook Fountain Lake Bridge

CB13 393862 6464272 Ephemeral



Figure 1 Map of Swan and Canning Catchment routine monitoring sites.



Table 3 Swan and Canning Catchment sampling regime.

Parameter measured Swan Canning Catchment sites

Temporal Pattern All year, when flowing

Number of sites SWANCATCH x 16, SCWQIP x 16

Spatial Pattern Fixed

Sampling Frequency Fortnightly

Total Suspended Solids (TSS) Grab sample

Total Nitrogen and Phosphorus (TN & TP) Grab sample

Soluble reactive Phosphorus, Nitrogen as

ammonia/ammonium, Total oxidised Nitrogen &

Dissolved organic Nitrogen (SRP, NH3-N/NH4-N,

NOx-N, DOrgN)

Grab sample (filtered)

Dissolved Organic Carbon (DOC) Grab sample (filtered)

Quanta (Dissolved Oxygen, pH & Specific

Conductivity)

In-situ

Field Observations All sites



Summary

This Swan Canning Catchment quarterly data report presents data collected from a

total of fifteen sites from the SWANCATCH project. Data are presented in graphical

and tabular form for ten key analytes; Total Nitrogen, Nitrogen as

ammonia/ammonium, Total oxidised nitrogen, Dissolved organic nitrogen, Total

phosphorus, Soluble reactive phosphorus, Dissolved organic carbon, Total

suspended solids, Dissolved oxygen and Specific conductivity.

At each site the data are presented as a graph showing the previous five years of

data as monthly box plots overlain by the current year monthly medians. Data for the

lower Ellen Brook site (SWN9) and eleven of the sixteen SCWQIP sites have not been

presented in graphs because sampling only began in March 2010. Monitoring began

at the remaining five of the sixteen SCWQIP sites in August 2011, hence data was

also not available for plotting. Catchment data are presented over a calendar year

(January to December), with quarterly reports corresponding to the quarters of the

year (Jan-Mar, Apr-Jun, Jul-Sep, Oct-Dec) and each quarterly report adding to the

“current year” data already presented.

This data report is the fourth quarterly report for 2015 and presents 2015 data from

January to December over background data from 2010 to 2014. The background

monthly box plots display the median, 25th, 75th, 10th and 90th percentiles where

sufficient data exists. The graphical program used (Sigma Plot) requires a minimum

of 3 data points to calculate 25th and 75th percentiles and a minimum of 9 data points

to calculate 10th and 90th percentiles. Due to the ephemerality of many of the

catchment sites and the fortnightly sampling regime, the background monthly sample

numbers may often be quite low. For clarity the background monthly sample numbers

(n) have been reported on each graph. The limit of reporting was halved when data

was below the limit to allow the data to be graphed.

The current year’s data (2015) is presented in tables showing monthly minimum,

maximum and median values and the number of samples collected for each analyte.

Data, collected from the sixteen SWANCATCH and sixteen SCWQIP sites, is also

displayed in tabular form near the end of this report with quarterly means and

standard deviations of the ten key analytes displayed for all sites in one comparison

table.

The September to December quarter saw Perth record 54.8mm of rainfall which is

just under two thirds of the long term average (90.1mm). Perth recorded its warmest

October on record and November saw “very much warmer than normal days and

nights” (BOM 2015).

Although all 16 sites were flowing at the beginning of October, by the end of

December almost half (7/16) had ceased to flow and were either stationary pools or

completely dry.



Stream flow across SW WA was much lower than average during 2015, and three of

the lowest stream flow years (total annual discharge) have come in the past six

years. Rainfall (617.8mm) recorded at Perth Metro for 2015 was ranked low and

amounted to 73% of the average annual total rainfall. Perth’s winter was noticeably

dry and the 9th driest on record at the Perth Metro site (BOM).

In terms of the catchment summaries it must be remembered, when attempting to

draw comparisons between monthly median data points and the previous five years

of data, that the background plot may be extrapolated from as few as 10 discrete

data points over a 5 year period. This is then compared against a monthly median of

as few as one or two, and a maximum of three, data points. Any collected data is

only representative of a single point in time at a specific place. The scope for natural

variability is high and any ‘analysis’ of this data must bear that in mind.



1 Avon R (SWN5)

SWN5 (AVON) TN

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

n=8 n=5 n=2 n=4 n=7 n=10 n=13 n=12 n=10 n=10 n=10 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWN5 (Avon R).

SWN5 (AVON) NH3-N


NH

3-N

(m

g L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

n=8 n=5 n=2 n=4 n=7 n=10 n=13 n=12 n=10 n=10 n=10 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN5 (AVON) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

n=8 n=5 n=2 n=4 n=7 n=10 n=13 n=12 n=10 n=10 n=10 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN5 (AVON) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

n=8 n=5 n=2 n=4 n=7 n=10 n=13 n=12 n=10 n=10 n=10 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90


The 90th Percentile for

August was 1.02mgL-1



SWN5 (AVON) TP


TP

(m

g L

-1)

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

n=8 n=5 n=2 n=4 n=7 n=10 n=13 n=12 n=10 n=10 n=10 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN5 (AVON) SRP


SR

P (

mg L

-1)

0.000

0.005

0.010

0.015

0.020

0.025

n=8 n=5 n=2 n=4 n=7 n=10 n=13 n=12 n=10 n=10 n=10 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90



Dec was 0.060mgL-1



SWN5 (AVON) DOC


DO

C (

mg L

-1)

0

5

10

15

20

25

30

35

n=8 n=5 n=2 n=4 n=7 n=10 n=13 n=12 n=10 n=10 n=10 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN5 (AVON) TSS


TS

S (

mg L

-1)

0

5

10

15

20

25

n=8 n=5 n=2 n=4 n=7 n=10 n=13 n=12 n=10 n=10 n=10 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90



August was 72mgL-1



SWN5 (AVON) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

n=8 n=5 n=2 n=4 n=7 n=10 n=13 n=12 n=10 n=10 n=10 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN5 (AVON) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0

5

10

15

20

25

30

n=8 n=5 n=2 n=4 n=7 n=10 n=13 n=12 n=10 n=10 n=10 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Figure 12 2015 Avon R flow at Walyunga (616011) – Daily discharge hydrograph measured in megalitres

Please note: flow data is from the Walyunga gauging station (616011) which is approximately 7 Km upstream of site SWN5 where the nutrient data is collected for the SWANCATCH project.

0

500

1000

1500

2000

2500

Da

ily

dis

cha

rge

(M

L)

Date

Avon River (Walyunga) 2015 flow



Table 4 2015 monthly sample numbers, minimum and maximum values at site SWN5 (Avon R).


TN (mg L-1)

n 0 0 0 0 0 3 2 2 2 2 2 2

min - - - - - 0.61 0.66 1.10 0.96 0.81 0.83 0.77

max - - - - - 0.90 1.10 1.60 1.00 0.90 0.87 0.77

med - - - - - 0.64 0.88 1.35 0.98 0.86 0.85 0.77

NH3-N (mg L-1)

n 0 0 0 0 0 3 2 2 2 2 2 2

min - - - - - <0.01 0.024 <0.01 0.024 0.063 0.021 0.020

max - - - - - 0.027 0.040 0.026 0.048 0.082 0.058 0.023

med - - - - - <0.01 0.032 0.016 0.036 0.073 0.040 0.022

NOx-N (mg L-1)

n 0 0 0 0 0 3 2 2 2 2 2 2

min - - - - - <0.01 0.017 0.018 0.039 0.047 0.013 <0.01

max - - - - - 0.012 0.046 0.350 0.042 0.055 0.033 <0.01

med - - - - - <0.01 0.032 0.184 0.041 0.051 0.023 <0.01

DOrgN (mg L-1)

n 0 0 0 0 0 3 2 2 2 2 2 2

min - - - - - 0.54 0.57 0.85 0.62 0.60 0.62 0.70

max - - - - - 0.72 0.73 0.94 0.63 0.68 0.76 0.72

med - - - - - 0.56 0.65 0.90 0.63 0.64 0.69 0.71

TP (mg L-1)

n 0 0 0 0 0 3 2 2 2 2 2 2

min - - - - - <0.005 0.017 0.046 0.021 0.014 0.008 <0.005

max - - - - - 0.026 0.035 0.046 0.036 0.021 0.012 0.014

med - - - - - 0.013 0.026 0.046 0.029 0.018 0.010 0.008

SRP (mg L-1)

n 0 0 0 0 0 3 2 2 2 2 2 2

min - - - - - <0.005 0.008 0.009 0.010 0.006 <0.005 <0.005

max - - - - - 0.011 0.010 0.011 0.016 0.007 0.008 <0.005

med - - - - - 0.009 0.009 0.010 0.013 0.007 0.005 <0.005

DOC (mg L-1)

n 0 0 0 0 0 3 2 2 2 2 2 2

min - - - - - 10 13 19 14 14 14 15

max - - - - - 14 18 19 16 15 14 17

med - - - - - 11 15.5 19 15 14.5 14 16

TSS (mg L-1)

n 0 0 0 0 0 3 2 2 2 2 2 2

min - - - - - 2 2 4 5 2 2 1

max - - - - - 4 7 10 12 3 2 2

med - - - - - 4 4.5 7 8.5 2.5 2 1.5



DO (mg L-1)

n 0 0 0 0 0 3 2 2 2 2 2 2

min - - - - - 7.27 6.61 8.24 6.41 5.75 4.20 4.49

max - - - - - 9.77 9.26 9.48 7.97 6.03 4.33 4.99

med - - - - - 8.28 7.94 8.86 7.19 5.89 4.27 4.74

Sp. Conductivity (mS cm-1)

n 0 0 0 0 0 3 2 2 2 2 2 2

min - - - - - 10.513 13.939 23.589 16.722 16.145 15.739 17.535

max - - - - - 13.390 19.817 31.989 19.038 16.575 16.949 19.098

med - - - - - 11.559 16.878 27.789 17.880 16.360 16.344 18.317

The peak TN and TP concentrations, unsurprisingly, coincided with the onset of (late)

winter flows in the Upper Avon during August and into September and a similar

pattern was also evident for NOx, dissolved organic nitrogen, SRP and DOC,

(although the phosphorus concentrations were low). The very high specific

conductivity recorded in August would suggest an input from a more saline sub

catchment of the Avon system further upstream.

Dissolved oxygen concentrations in the water were relatively low from September to

the end of 2015; presumably due to a combination of steadily reducing flows but also

rapidly increasing water temperature (from 15ºC in Sept to almost 25 ºC by early

Nov).

The apparently low TN in June was only due to the fact there were three data points

and the median value was unrepresentatively low.



2 Bannister Ck (SWS2)

SWS2 (BANNISTER) TN


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWS2 (Bannister Ck).

SWS2 (BANNISTER) NH3-N


NH

3-N

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



April was 0.71mgL-1



SWS2 (BANNISTER) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWS2 (Bannister Ck).

SWS2 (BANNISTER) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS2 (BANNISTER) TP


TP

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS2 (BANNISTER) SRP


SR

P (

mg L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



May was 0.73mgL-1


May was 0.93mgL-1



SWS2 (BANNISTER) DOC


DO

C (

mg L

-1)

0

5

10

15

20

25

30

35

40

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS2 (BANNISTER) TSS


TS

S (

mg L

-1)

0

5

10

15

20

25

30

35

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS2 (BANNISTER) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS2 (BANNISTER) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.5

1.0

1.5

2.0

2.5

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Table 5 2015 monthly sample numbers, minimum and maximum values at SWS2 (Bannister Ck).


TN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 1.3 1.1 1.1 0.91 0.86 1.2 1.1 1.1 1.30 1.00 1.10 1.1

max 1.3 1.2 1.2 1.20 1.00 1.9 1.1 1.1 1.40 1.30 1.20 1.4

med 1.3 1.15 1.15 1.055 0.93 1.3 1.1 1.1 1.35 1.15 1.15 1.4

NH3-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.046 0.056 0.066 0.066 0.066 0.067 0.064 0.053 0.023 0.027 0.026 0.028

max 0.053 0.086 0.067 0.092 0.073 0.670 0.067 0.056 0.035 0.057 0.067 0.072

med 0.050 0.071 0.067 0.079 0.070 0.076 0.066 0.055 0.029 0.042 0.047 0.064

NOx-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.041 0.059 0.056 0.17 0.14 0.30 0.38 0.37 0.38 0.13 0.02 0.031

max 0.044 0.120 0.077 0.18 0.26 0.46 0.38 0.40 0.48 0.25 0.18 0.046

med 0.043 0.090 0.067 0.175 0.20 0.32 0.38 0.39 0.43 0.19 0.10 0.037

DOrgN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 1.1 0.74 0.84 0.550 0.42 0.69 0.54 0.49 0.51 0.80 0.57 0.90

max 1.1 0.98 0.99 0.720 0.66 0.83 0.63 0.61 0.88 0.89 0.71 1.30

med 1.1 0.86 0.92 0.635 0.54 0.80 0.59 0.55 0.70 0.85 0.64 0.94

TP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.11 0.11 0.097 0.10 0.067 0.082 0.059 0.051 0.053 0.099 0.081 0.098

max 0.13 0.15 0.110 0.12 0.083 0.190 0.065 0.053 0.060 0.099 0.120 0.110

med 0.12 0.13 0.104 0.11 0.075 0.089 0.062 0.052 0.057 0.099 0.101 0.110

SRP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.052 0.067 0.049 0.062 0.034 0.047 0.035 0.026 0.026 0.043 0.044 0.030

max 0.072 0.098 0.067 0.069 0.051 0.110 0.038 0.030 0.028 0.045 0.046 0.049

med 0.062 0.083 0.058 0.066 0.043 0.053 0.037 0.028 0.027 0.044 0.045 0.039

DOC (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 25 22 23 11 8 20 19 16 23 23 16 23

max 30 25 27 16 14 22 20 18 24 23 25 26

med 27.5 23.5 25 13.5 11 20 19.5 17 23.5 23 20.5 26

TSS (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 4 5 4 5 2 4 1 2 2 4 5 8

max 5 5 18 13 4 15 2 3 2 6 7 11

med 4.5 5 11 9 3 4 1.5 2.5 2 5 6 8



DO (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 2.26 1.71 2.98 2.55 5.65 5.86 7.58 7.99 5.91 5.58 4.05 2.53

max 2.42 2.79 3.33 5.15 7.38 7.05 7.90 8.74 6.69 6.03 6.33 4.29

med 2.34 2.25 3.16 3.85 6.52 6.36 7.74 8.37 6.30 5.81 5.19 3.11


n 2 2 2 2 2 3 2 2 2 2 2 3

min 1.111 0.801 0.969 0.433 0.343 0.614 0.653 0.536 0.704 0.685 0.452 0.941

max 1.406 1.187 1.408 0.734 0.615 0.915 0.667 0.553 0.823 0.768 0.878 1.096

med 1.259 0.994 1.189 0.584 0.479 0.787 0.660 0.545 0.764 0.727 0.665 1.096

The 2015 Bannister Creek data was unremarkable and generally followed the

previous 5 years background plot.



3 Bayswater MD (SWS10)

SWS10 (BAYSWATER) TN


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWS10 (Bayswater MD).

SWS10 (BAYSWATER) NH3-N


NH

3-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



July was 4.56mgL-1



SWS10 (BAYSWATER) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWS10 (Bayswater

MD).

SWS10 (BAYSWATER) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


MD).


July was 3.46mgL-1



SWS10 (BAYSWATER) TP


TP

(m

g L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS10 (BAYSWATER) SRP


SR

P (

mg L

-1)

0.000

0.005

0.010

0.015

0.020

0.025

0.030

0.035

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


MD).


July was 2.48mgL-1


July was 0.34mgL-1


Dec was 0.09mgL-1



SWS10 (BAYSWATER) DOC


DO

C (

mg L

-1)

0

5

10

15

20

25

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


MD).

SWS10 (BAYSWATER) TSS


TS

S (

mg L

-1)

0

10

20

30

40

50

60

70

80

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



January was 36.6mgL-1



SWS10 (BAYSWATER) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

14

n=12 n=9 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS10 (BAYSWATER) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Figure 33 2015 Bayswater MD flow (616082) – Daily discharge hydrograph measured in megalitres

0

20

40

60

80

100

120

140

160

Da

ily

dis

cha

rge

(M

L)

Date

Bayswater MD (SWS10) 2015 flow



Table 6 2015 monthly sample numbers, minimum and maximum values at SWS10 (Bayswater MD).


TN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 1.4 1.4 1.5 0.84 1.1 1.4 1.1 1.2 1.2 1.20 1.1 1.2

max 1.4 1.5 2.0 1.60 1.5 1.7 1.5 1.2 1.2 1.30 1.9 1.5

med 1.4 1.45 1.75 1.22 1.3 1.5 1.3 1.2 1.2 1.25 1.5 1.2

NH3-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.43 0.46 0.56 0.20 0.30 0.37 0.25 0.24 0.24 0.3 0.34 0.36

max 0.57 0.56 0.70 0.52 0.53 0.45 0.43 0.26 0.26 0.3 0.65 0.45

med 0.50 0.51 0.63 0.36 0.42 0.44 0.34 0.25 0.25 0.3 0.50 0.38

NOx-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.41 0.38 0.38 0.26 0.37 0.46 0.38 0.44 0.48 0.34 0.32 0.23

max 0.47 0.42 0.48 0.56 0.46 0.60 0.59 0.51 0.48 0.38 0.34 0.39

med 0.44 0.40 0.43 0.41 0.42 0.51 0.49 0.48 0.48 0.36 0.33 0.29

DOrgN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.30 0.33 0.43 0.26 0.34 0.50 0.31 0.44 0.33 0.48 0.44 0.36

max 0.44 0.51 0.64 0.45 0.47 0.53 0.39 0.45 0.38 0.55 0.54 0.80

med 0.37 0.42 0.54 0.36 0.41 0.51 0.35 0.45 0.36 0.52 0.49 0.41

TP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.046 0.042 0.043 0.038 0.029 0.050 0.053 0.039 0.034 0.039 0.047 0.036

max 0.049 0.065 0.086 0.067 0.048 0.058 0.093 0.040 0.035 0.043 0.085 0.063

med 0.048 0.054 0.065 0.053 0.039 0.052 0.073 0.040 0.035 0.041 0.066 0.038

SRP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.009 0.006 0.01 0.013 0.012 0.012 0.016 0.018 0.013 0.014 0.007 0.005

max 0.010 0.019 0.012 0.016 0.016 0.018 0.021 0.019 0.015 0.014 0.029 0.011

med 0.010 0.013 0.011 0.015 0.014 0.017 0.019 0.019 0.014 0.014 0.018 0.007

DOC (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 11 12 12 7 8 11 12 14 15 15 14 11

max 12 12 13 10 10 14 14 14 16 17 15 13

med 11.5 12 12.5 8.5 9 12 13 14 15.5 16 14.5 12

TSS (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 8 13 12 9 6 8 11 3 4 4 5 11

max 10 17 32 12 10 11 15 4 4 7 12 28

med 9 15 22 10.5 8 10 13 3.5 4 5.5 8.5 11



DO (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 6.35 1.17 5.00 6.89 7.5 7.11 7.39 7.69 8.17 8.90 7.33 7.64

max 8.29 7.38 5.38 7.40 8.27 8.18 8.10 7.91 9.51 9.09 7.64 7.90

med 7.32 4.28 5.19 7.15 7.89 7.38 7.75 7.80 8.84 9.00 7.49 7.79


n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.797 0.799 0.806 0.340 0.521 0.645 0.479 0.617 0.703 0.716 0.619 0.790

max 0.803 0.830 0.806 0.778 0.760 0.754 0.762 0.643 0.751 0.767 0.786 0.819

med 0.800 0.815 0.806 0.559 0.641 0.748 0.621 0.630 0.727 0.742 0.703 0.806

The Bayswater MD gauge experience some problems affecting stage height, hence

the hydrograph only begins in mid-March.

The catchment is typically flashy in response to rain events; being entirely urbanised.

The 2015 data generally followed the background plot, however this catchment’s

response to rain and the relatively late onset of winter rain and flow in 2015 resulted

in some parameters (most notably NOx, SRP and DOC) being recorded at

concentrations outside the 10th to 90th percentiles; this is however not unexpected

since flow is in response to changing rainfall patterns and also given the clear

variability in the data for some of the measured parameters.



4 Bennett Bk (SWN12)

SWN12 (BENNETT BK) TN


TN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWN12 (Bennett Bk).

SWN12 (BENNETT BK) NH3-N


NH

3-N

(m

g L

-1)

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



January was 0.32mgL-1


Dec was 0.49mgL-1



SWN12 (BENNETT BK) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWN12 (Bennett Bk).

SWN12 (BENNETT BK) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN12 (BENNETT BK) TP


TP

(m

g L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN12 (BENNETT BK) SRP


SR

P (

mg L

-1)

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN12 (BENNETT BK) DOC


DO

C (

mg L

-1)

0

5

10

15

20

25

30

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN12 (BENNETT BK) TSS


TS

S (

mg L

-1)

0

5

10

15

20

25

30

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN12 (BENNETT BK) DO


DO

(m

g L

-1)

0

2

4

6

8

10

n=12 n=9 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN12 (BENNETT BK) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Figure 44 2015 Bennett Bk flow (616084) – Daily discharge hydrograph measured in megalitres

0

5

10

15

20

25

Da

ily

dis

cha

rge

(M

L)

Date

Bennett Bk (SWN12) 2015 flow



Table 7 2015 monthly sample numbers, minimum and maximum values at SWN12 (Bennett Bk).


TN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.43 0.87 0.75 0.91 0.84 1.1 1.10 1.00 0.90 0.97 0.95 0.73

max 0.83 0.90 0.79 1.00 0.88 1.2 1.20 1.10 1.20 1.20 1.10 1.00

med 0.63 0.89 0.77 0.96 0.86 1.1 1.15 1.05 1.05 1.09 1.025 0.81

NH3-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.024 0.028 0.021 0.034 0.046 0.042 0.062 0.037 <0.01 0.028 0.026 <0.01

max 0.030 0.040 0.026 0.044 0.057 0.075 0.071 0.063 0.039 0.034 0.041 0.031

med 0.027 0.034 0.024 0.039 0.052 0.043 0.067 0.050 0.022 0.031 0.0335 0.025

NOx-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.071 0.12 0.089 0.24 0.20 0.32 0.42 0.45 0.34 0.30 0.15 0.025

max 0.099 0.150 0.120 0.26 0.21 0.49 0.49 0.50 0.43 0.34 0.20 0.064

med 0.085 0.135 0.105 0.25 0.21 0.40 0.46 0.48 0.39 0.32 0.18 0.025

DOrgN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.28 0.62 0.58 0.49 0.55 0.56 0.48 0.54 0.43 0.51 0.66 0.58

max 0.62 0.74 0.60 0.57 0.59 0.61 0.49 0.58 0.64 0.68 0.70 0.88

med 0.45 0.68 0.59 0.53 0.57 0.57 0.49 0.56 0.54 0.60 0.68 0.59

TP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.074 0.068 0.049 0.047 0.030 0.056 0.044 0.033 0.039 0.058 0.064 0.064

max 0.078 0.078 0.059 0.081 0.045 0.058 0.064 0.037 0.047 0.063 0.070 0.097

med 0.076 0.073 0.054 0.064 0.038 0.057 0.054 0.035 0.043 0.061 0.067 0.075

SRP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.031 0.043 0.029 0.026 0.022 0.022 0.019 0.019 0.020 0.026 0.023 0.018

max 0.038 0.045 0.030 0.028 0.022 0.023 0.022 0.021 0.027 0.027 0.031 0.030

med 0.035 0.044 0.030 0.027 0.022 0.022 0.021 0.020 0.024 0.027 0.027 0.024

DOC (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 16 17 16 13 13 13 14 16 17 18 19 17

max 18 18 17 14 13 16 16 17 19 19 19 18

med 17 17.5 16.5 13.5 13 13 15 16.5 18 18.5 19 18

TSS (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 5 6 3 6 3 6 8 2 3 4 3 3

max 5 7 5 8 3 8 13 2 5 5 6 4

med 5 6.5 4 7 3 8 10.5 2 4 4.5 4.5 4



DO (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 5.03 4.41 4.70 4.83 6.21 6.17 7.15 7.08 6.77 6.44 5.47 5.61

max 5.05 4.99 5.85 5.59 6.46 6.56 7.68 7.33 6.84 6.67 5.62 6.77

med 5.04 4.70 5.28 5.21 6.34 6.40 7.42 7.21 6.81 6.56 5.55 6.30


n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.639 0.675 0.697 0.640 0.628 0.661 0.485 0.568 0.631 0.651 0.590 0.677

max 0.708 0.688 0.725 0.690 0.686 0.707 0.668 0.586 0.634 0.670 0.673 0.712

med 0.674 0.682 0.711 0.665 0.657 0.664 0.577 0.577 0.633 0.661 0.632 0.692

The 2015 Bennett Brook data again generally followed a similar pattern to the

background data for the previous five years, with some minor variability typical of

substantially modified semi urbanised and urbanised catchments.



5 Bickley Bk (SWS4)

SWS4 (BICKLEY BK) TN


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

n=3 n=3 n=5 n=5 n=7 n=10 n=13 n=12 n=10 n=10 n=8 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWS4 (Bickley Bk).

SWS4 (BICKLEY BK) NH3-N


NH

3-N

(m

g L

-1)

0.00

0.02

0.04

0.06

0.08

0.10

0.12

n=3 n=3 n=5 n=5 n=7 n=10 n=13 n=12 n=10 n=10 n=8 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90



June was 4.05mgL-1


June was 5.52mgL-1



SWS4 (BICKLEY BK) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

n=3 n=3 n=5 n=5 n=7 n=10 n=13 n=12 n=10 n=10 n=8 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWS4 (Bickley Bk).

SWS4 (BICKLEY BK) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

n=3 n=3 n=5 n=5 n=7 n=10 n=13 n=12 n=10 n=10 n=8 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS4 (BICKLEY BK) TP


TP

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

n=3 n=3 n=5 n=5 n=7 n=10 n=13 n=12 n=10 n=10 n=8 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS4 (BICKLEY BK) SRP


SR

P (

mg L

-1)

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

n=3 n=3 n=5 n=5 n=7 n=10 n=13 n=12 n=10 n=10 n=8 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS4 (BICKLEY BK) DOC


DO

C (

mg L

-1)

0

5

10

15

20

25

30

n=3 n=3 n=5 n=5 n=7 n=10 n=13 n=12 n=10 n=10 n=8 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS4 (BICKLEY BK) TSS


TS

S (

mg L

-1)

0

5

10

15

20

25

30

35

n=3 n=3 n=5 n=5 n=7 n=10 n=13 n=12 n=10 n=10 n=8 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90



June was 77mgL-1



SWS4 (BICKLEY BK) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

14

n=3 n=3 n=5 n=5 n=7 n=10 n=13 n=12 n=10 n=10 n=8 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS4 (BICKLEY BK) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.5

1.0

1.5

2.0

2.5

n=3 n=3 n=5 n=5 n=7 n=10 n=13 n=12 n=10 n=10 n=8 n=10

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Figure 55 2015 Bickley Bk flow (616047) – Daily discharge hydrograph measured in megalitres

0

10

20

30

40

50

60

70

Da

ily

dis

cha

rge

(M

L)

Date

Bickley Bk (SWS4) 2015 flow



Table 8 2015 monthly sample numbers, minimum and maximum values at SWS4 (Bickley Bk).


TN (mg L-1)

n 0 0 0 1 2 3 2 2 2 2 2 2

min - - - 0.48 0.55 0.39 1.40 1.30 0.64 0.41 0.45 0.49

max - - - 0.48 4.10 2.80 1.50 1.90 1.00 0.59 0.49 0.60

med - - - 0.48 2.33 1.40 1.45 1.60 0.82 0.50 0.47 0.55

NH3-N (mg L-1)

n 0 0 0 1 2 3 2 2 2 2 2 2

min - - - <0.01 0.013 <0.01 0.030 <0.01 0.016 <0.01 0.017 0.016

max - - - <0.01 0.040 0.083 0.031 0.031 0.020 0.011 0.021 0.034

med - - - <0.01 0.027 0.019 0.031 0.018 0.018 0.008 0.019 0.025

NOx-N (mg L-1)

n 0 0 0 1 2 3 2 2 2 2 2 2

min - - - 0.12 0.023 <0.01 1.1 0.9 0.32 0.02 <0.01 <0.01

max - - - 0.12 3.500 2.30 1.1 1.5 0.54 0.036 0.021 0.012

med - - - 0.12 1.762 0.86 1.1 1.2 0.43 0.028 0.013 0.009

DOrgN (mg L-1)

n 0 0 0 1 2 3 2 2 2 2 2 2

min - - - 0.35 0.35 0.38 0.15 0.28 0.21 0.39 0.29 0.37

max - - - 0.35 0.45 0.50 0.35 0.36 0.28 0.48 0.36 0.47

med - - - 0.35 0.40 0.43 0.25 0.32 0.25 0.44 0.33 0.42

TP (mg L-1)

n 0 0 0 1 2 3 2 2 2 2 2 2

min - - - 0.078 0.052 0.030 0.028 0.026 0.013 0.039 0.032 0.030

max - - - 0.078 0.056 0.100 0.031 0.042 0.013 0.050 0.049 0.045

med - - - 0.078 0.054 0.042 0.030 0.034 0.013 0.045 0.041 0.038

SRP (mg L-1)

n 0 0 0 1 2 3 2 2 2 2 2 2

min - - - 0.031 0.018 0.007 0.007 0.015 <0.005 0.010 <0.005 <0.005

max - - - 0.031 0.021 0.046 0.009 0.017 <0.005 0.011 0.020 0.010

med - - - 0.031 0.020 0.013 0.008 0.016 <0.005 0.011 0.011 0.006

DOC (mg L-1)

n 0 0 0 1 2 3 2 2 2 2 2 2

min - - - 8 8 7 7 7 6 11 6 11

max - - - 8 10 11 8 8 7 13 11 13

med - - - 8 9 9 7.5 7.5 6.5 12 8.5 12

TSS (mg L-1)

n 0 0 0 1 2 3 2 2 2 2 2 2

min - - - 4 1 <1 1 4 1 1 0.5 0.5

max - - - 4 2 10 2 5 1 2 2 1

med - - - 4 1.5 2 1.5 4.5 1 1.5 1.25 0.75



DO (mg L-1)

n 0 0 0 1 2 3 2 2 2 2 2 2

min - - - 2.82 1.78 5.72 7.05 5.85 5.78 2.59 3.79 4.68

max - - - 2.82 5.29 7.49 9.75 7.07 6.07 6.07 6.34 5.85

med - - - 2.82 3.54 6.16 8.40 6.46 5.93 4.33 5.07 5.27


n 0 0 0 1 2 3 2 2 2 2 2 2

min - - - 0.276 0.459 0.402 0.965 0.470 0.908 0.710 0.464 0.975

max - - - 0.276 0.691 1.139 1.028 0.701 0.964 0.916 1.710 1.770

med - - - 0.276 0.575 1.101 0.997 0.586 0.936 0.813 1.087 1.373

The Bickley Brook catchment is small and flashy in response to rain events. As a

result the variation in measured analytes is relatively large compared to other

catchments. The spike in TN concentration during May was largely due to the NOx

concentration; events like this are not uncommon in this catchment and are also part

of the reason for the great variability seen in measured analytes; in conjunction with

the poor land use practices often observed in the surrounding area.



6 Blackadder Ck (SWN8)

SWN8 (BLACKADDER) TN


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

n=1 n=1 n=4 n=2 n=4 n=8 n=11 n=12 n=10 n=10 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWN8 (Blackadder Ck).

SWN8 (BLACKADDER) NH3-N


NH

3-N

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

n=1 n=1 n=4 n=2 n=4 n=8 n=11 n=12 n=10 n=10 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90



July was 2.26mgL-1


July was 6.26mgL-1



SWN8 (BLACKADDER) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

n=1 n=1 n=4 n=2 n=4 n=8 n=11 n=12 n=10 n=10 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWN8 (Blackadder

Ck).

SWN8 (BLACKADDER) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

n=1 n=1 n=4 n=2 n=4 n=8 n=11 n=12 n=10 n=10 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90


Ck).


August was 2.77mgL-1


July was 3.58mgL-1



SWN8 (BLACKADDER) TP


TP

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

n=1 n=1 n=4 n=2 n=4 n=8 n=11 n=12 n=10 n=10 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN8 (BLACKADDER) SRP


SR

P (

mg L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

n=1 n=1 n=4 n=2 n=4 n=8 n=11 n=12 n=10 n=10 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90


Ck).



SWN8 (BLACKADDER) DOC


DO

C (

mg L

-1)

0

10

20

30

40

50

n=1 n=1 n=4 n=2 n=4 n=8 n=11 n=12 n=10 n=10 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90


Ck).

SWN8 (BLACKADDER) TSS


TS

S (

mg L

-1)

0

10

20

30

40

50

60

70

n=1 n=1 n=4 n=2 n=4 n=8 n=11 n=12 n=10 n=10 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN8 (BLACKADDER) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

n=1 n=1 n=4 n=2 n=4 n=8 n=11 n=12 n=10 n=10 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN8 (BLACKADDER) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.5

1.0

1.5

2.0

2.5

n=1 n=1 n=4 n=2 n=4 n=8 n=11 n=12 n=10 n=10 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Table 9 2015 monthly sample numbers, minimum and maximum values at SWN8 (Blackadder

Ck).


TN (mg L-1)

n 0 0 0 2 2 3 2 2 2 2 2 1

min - - - 0.57 0.58 0.40 0.43 1.0 0.84 0.76 0.53 0.5

max - - - 0.79 0.70 1.00 1.40 1.6 0.89 0.88 0.63 0.5

med - - - 0.68 0.64 0.68 0.92 1.3 0.87 0.82 0.58 0.5

NH3-N (mg L-1)

n 0 0 0 2 2 3 2 2 2 2 2 1

min - - - 0.018 0.012 0.016 0.024 <0.01 <0.01 0.022 <0.01 0.014

max - - - 0.046 0.042 0.071 0.066 0.037 <0.01 0.05 0.044 0.014

med - - - 0.032 0.027 0.043 0.045 0.021 <0.01 0.036 0.025 0.014

NOx-N (mg L-1)

n 0 0 0 2 2 3 2 2 2 2 2 1

min - - - 0.012 <0.01 <0.01 0.15 0.46 0.34 0.30 0.011 <0.01

max - - - 0.250 0.160 0.36 1.00 1.00 0.47 0.34 0.100 <0.01

med - - - 0.131 0.083 0.24 0.58 0.73 0.41 0.32 0.056 <0.01

DOrgN (mg L-1)

n 0 0 0 2 2 3 2 2 2 2 2 1

min - - - 0.45 0.49 0.36 0.21 0.45 0.32 0.34 0.42 0.43

max - - - 0.50 0.56 0.61 0.32 0.50 0.38 0.43 0.43 0.43

med - - - 0.48 0.53 0.40 0.27 0.48 0.35 0.39 0.43 0.43

TP (mg L-1)

n 0 0 0 2 2 3 2 2 2 2 2 1

min - - - 0.021 0.04 0.027 0.027 0.032 0.015 0.028 0.044 0.064

max - - - 0.078 0.046 0.076 0.039 0.056 0.040 0.030 0.060 0.064

med - - - 0.050 0.043 0.027 0.033 0.044 0.028 0.029 0.052 0.064

SRP (mg L-1)

n 0 0 0 2 2 3 2 2 2 2 2 1

min - - - 0.021 0.023 0.013 0.017 0.017 0.008 0.008 0.013 0.023

max - - - 0.040 0.023 0.051 0.023 0.021 0.011 0.010 0.033 0.023

med - - - 0.031 0.023 0.013 0.020 0.019 0.010 0.009 0.023 0.023

DOC (mg L-1)

n 0 0 0 2 2 3 2 2 2 2 2 1

min - - - 8 9 8 6 11 7 8 8 13

max - - - 10 10 11 7 11 8 9 11 13

med - - - 9 9.5 8 6.5 11 7.5 8.5 9.5 13

TSS (mg L-1)

n 0 0 0 2 2 3 2 2 2 2 2 1

min - - - 2 1 2 3 2 1 4 1 3

max - - - 3 1 5 4 4 4 6 5 3

med - - - 2.5 1 2 3.5 3 2.5 5 3 3



DO (mg L-1)

n 0 0 0 2 2 3 2 2 2 2 2 1

min - - - 1.49 3.31 3.44 6.05 7.06 7.98 6.76 2.87 3.03

max - - - 4.11 4.98 4.74 8.15 7.06 8.89 8.21 4.00 3.03

med - - - 2.80 4.15 4.54 7.10 7.06 8.44 7.49 3.44 3.03


n 0 0 0 2 2 3 2 2 2 2 2 1

min - - - 0.214 0.913 1.142 0.405 0.759 1.283 1.527 0.665 1.122

max - - - 1.626 1.356 1.402 0.957 1.328 1.513 1.565 1.761 1.122

med - - - 0.920 1.135 1.318 0.681 1.044 1.398 1.546 1.213 1.122

TP and SRP in Blackadder Creek during April, May and June 2015 were noticeably

lower than the previous 5 years of data; although it’s important to note there is a less

background data from those months that for wetter months so this may simply be

normal variation.



7 Canning R (SWS12)

SWS12 (CANNING) TN


TN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWS12 (Canning R).

SWS12 (CANNING) NH3-N


NH

3-N

(m

g L

-1)

0.00

0.02

0.04

0.06

0.08

0.10

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



Nov was 0.26mgL-1



SWS12 (CANNING) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWS12 (Canning R).

SWS12 (CANNING) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS12 (CANNING) TP


TP

(m

g L

-1)

0.00

0.02

0.04

0.06

0.08

0.10

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS12 (CANNING) SRP


SR

P (

mg L

-1)

0.000

0.005

0.010

0.015

0.020

0.025

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS12 (CANNING) DOC


DO

C (

mg L

-1)

0

2

4

6

8

10

12

14

16

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS12 (CANNING) TSS


TS

S (

mg L

-1)

0

5

10

15

20

25

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



Sept was 44mgL-1


June was 65mgL-1



SWS12 (CANNING) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWS12 (Canning).

SWS12 (CANNING) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Figure 76 2015 Canning River flow (616027) – Daily discharge hydrograph measured in megalitres

0

50

100

150

200

250

300

Da

ily

dis

cha

rge

(M

L)

Date

Upper Canning (SWS12) 2015 flow



Table 10 2015 monthly sample numbers, minimum and maximum values at SWS12 (Canning R).


TN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.17 0.19 0.20 0.18 0.24 0.39 0.34 0.66 0.40 0.24 0.29 0.15

max 0.26 0.30 0.22 0.29 0.89 0.87 0.46 0.72 0.52 0.47 0.39 0.34

med 0.22 0.25 0.21 0.24 0.57 0.46 0.40 0.69 0.46 0.36 0.34 0.18

NH3-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.013 <0.01 0.017 <0.01 0.018 0.023 0.041 0.025 0.021 0.030 0.033 0.029

max 0.032 0.014 0.025 0.023 0.045 0.078 0.047 0.042 0.025 0.034 0.044 0.040

med 0.023 0.010 0.021 0.014 0.032 0.042 0.044 0.034 0.023 0.032 0.039 0.031

NOx-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.017 <0.01 0.011 0.038 0.016 0.16 0.25 0.44 0.21 0.12 0.048 <0.01

max 0.020 0.019 0.020 0.099 0.540 0.35 0.29 0.48 0.24 0.16 0.084 0.035

med 0.019 0.012 0.016 0.069 0.278 0.24 0.27 0.46 0.23 0.14 0.066 0.028

DOrgN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.14 0.17 0.16 0.11 0.18 0.14 0.057 0.150 0.17 0.088 0.130 0.074

max 0.19 0.19 0.17 0.17 0.25 0.38 0.120 0.200 0.17 0.250 0.180 0.240

med 0.17 0.18 0.17 0.14 0.22 0.16 0.089 0.175 0.17 0.169 0.155 0.110

TP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.011 0.009 0.008 <0.005 <0.005 0.011 0.011 0.018 0.007 0.012 0.011 0.008

max 0.014 0.013 0.008 0.016 0.020 0.037 0.013 0.020 0.010 0.019 0.017 0.013

med 0.013 0.011 0.008 0.009 0.011 0.016 0.012 0.019 0.009 0.016 0.014 0.011

SRP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min <0.005 <0.005 <0.005 <0.005 <0.005 0.006 0.008 0.008 <0.005 0.006 <0.005 <0.005

max <0.005 0.010 <0.005 0.007 0.006 0.020 0.009 0.009 0.005 0.009 0.009 0.013

med <0.005 0.0063 <0.005 0.005 0.004 0.006 0.009 0.009 0.004 0.008 0.006 0.007

DOC (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 3 4 3 3 3 3 4 5 4 4 3 3

max 3 4 3 5 6 5 5 6 4 5 5 4

med 3 4 3 4 4.5 3 4.5 5.5 4 4.5 4 4

TSS (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 1 2 1 1 1 1 <1 1 1 <1 1 1

max 1 3 1 2 4 15 1 3 1 <1 2 1

med 1 2.5 1 1.5 2.5 4 0.75 2 1 <1 1.5 1



DO (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 3.18 2.38 3.28 4.97 6.52 6.49 7.56 8.43 7.72 6.34 4.63 3.38

max 4.18 3.81 5.42 5.51 7.16 8.30 8.93 8.61 8.01 6.49 6.38 5.32

med 3.68 3.10 4.35 5.24 6.84 7.79 8.25 8.52 7.87 6.42 5.51 4.20


n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.544 0.582 0.600 0.500 0.578 0.620 0.598 0.517 0.568 0.698 0.586 0.756

max 0.675 0.584 0.606 0.589 0.740 0.826 0.643 0.521 0.628 0.750 0.782 0.800

med 0.610 0.583 0.603 0.545 0.659 0.729 0.621 0.519 0.598 0.724 0.684 0.770

The Canning River generally has good water quality, as was the case in 2015; but

there was a relatively high concentration recorded (above the 90th percentile) in May

for TN and NOx which coincided with the second highest peak flow event for the

year. Other 2015 data was generally similar to the background plot of the previous

five years of collected data.

The specific conductivity recorded in December was higher than background data;

possibly due to flashy inputs to the catchment (seen in the hydrograph in early

November and December) and the materials that would have deposited into the

system. It could also be simply a shift due to changing patterns of rainfall and stream

flow, when you consider the difference between the November and the December

background data for specific conductivity.



8 Ellen Bk (SWN3)

SWN3 (ELLEN BK) TN


TN

(m

g L

-1)

0

1

2

3

4

5

n=0 n=0 n=0 n=0 n=0 n=3 n=11 n=12 n=10 n=9 n=6 n=3

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWN3 (Ellen Bk).

SWN3 (ELLEN BK) NH3-N


NH

3-N

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

n=0 n=0 n=0 n=0 n=0 n=3 n=11 n=12 n=10 n=9 n=6 n=3

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN3 (ELLEN BK) NOx-N


NO

x-N

(m

g L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

n=0 n=0 n=0 n=0 n=0 n=3 n=11 n=12 n=10 n=9 n=6 n=3

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWN3 (Ellen Bk).

SWN3 (ELLEN BK) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

n=0 n=0 n=0 n=0 n=0 n=3 n=11 n=12 n=10 n=9 n=6 n=3

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN3 (ELLEN BK) TP


TP

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=0 n=0 n=0 n=0 n=0 n=3 n=11 n=12 n=10 n=9 n=6 n=3

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN3 (ELLEN BK) SRP


SR

P (m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

n=0 n=0 n=0 n=0 n=0 n=3 n=11 n=12 n=10 n=9 n=6 n=3

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN3 (ELLEN BK) DOC


DO

C (

mg L

-1)

0

10

20

30

40

50

60

70

80

n=0 n=0 n=0 n=0 n=0 n=3 n=11 n=12 n=10 n=9 n=6 n=3

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN3 (ELLEN BK) TSS


TS

S (

mg L

-1)

0

10

20

30

40

50

n=0 n=0 n=0 n=0 n=0 n=3 n=11 n=12 n=10 n=9 n=6 n=3

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN3 (ELLEN BK) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

14

n=0 n=0 n=0 n=0 n=0 n=3 n=11 n=12 n=10 n=9 n=6 n=3

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN3 (ELLEN BK) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

n=0 n=0 n=0 n=0 n=0 n=3 n=11 n=12 n=10 n=9 n=6 n=3

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Figure 87 2015 Ellen Bk flow (616189) – Daily discharge hydrograph measured in megalitres

0

50

100

150

200

250

300

Da

ily

dis

cha

rge

(M

L)

Date

Ellen Bk (SWN3) 2015 flow



Table 11 2015 monthly sample numbers, minimum and maximum values at SWN3 (Ellen Bk).


TN (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 0 0

min - - - - - 2.3 1.70 2.30 2.6 2.2 - -

max - - - - - 2.3 2.00 3.20 2.6 3.2 - -

med - - - - - 2.3 1.85 2.75 2.6 2.7 - -

NH3-N (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 0 0

min - - - - - 0.18 0.078 0.048 0.027 0.085 - -

max - - - - - 0.18 0.090 0.082 0.073 0.170 - -

med - - - - - 0.18 0.084 0.065 0.050 0.128 - -

NOx-N (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 0 0

min - - - - - 0.024 0.025 0.058 0.023 0.035 - -

max - - - - - 0.024 0.031 0.067 0.048 0.048 - -

med - - - - - 0.024 0.028 0.063 0.036 0.042 - -

DOrgN (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 0 0

min - - - - - 1.5 1.40 1.9 1.9 1.90 - -

max - - - - - 1.5 1.90 2.9 2.1 2.00 - -

med - - - - - 1.5 1.65 2.4 2.0 1.95 - -

TP (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 0 0

min - - - - - 0.3 0.220 0.22 0.310 0.51 - -

max - - - - - 0.3 0.230 0.44 0.320 0.81 - -

med - - - - - 0.3 0.225 0.33 0.315 0.66 - -

SRP (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 0 0

min - - - - - 0.10 0.12 0.13 0.19 0.310 - -

max - - - - - 0.10 0.12 0.30 0.21 0.420 - -

med - - - - - 0.10 0.12 0.22 0.20 0.365 - -

DOC (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 0 0

min - - - - - 30 37 45 51 47 - -

max - - - - - 30 41 63 55 47 - -

med - - - - - 30 39 54 53 47 - -

TSS (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 0 0

min - - - - - 25 8 3 2 5 - -

max - - - - - 25 11 5 3 16 - -

med - - - - - 25 9.5 4 2.5 10.5 - -



DO (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 0 0

min - - - - - 7.24 6.27 7.81 5.93 2.38 - -

max - - - - - 7.24 6.68 8.16 6.59 3.48 - -

med - - - - - 7.24 6.48 7.99 6.26 2.93 - -


n 0 0 0 0 0 1 2 2 2 2 0 0

min - - - - - 3.669 2.244 1.604 2.074 2.320 - -

max - - - - - 3.669 2.453 2.247 2.100 2.605 - -

med - - - - - 3.669 2.349 1.926 2.087 2.463 - -

Ellen Brook only flowed for 4 months during, which is an unusually short period of

time. The 2015 data generally followed the background data; but that it is quite

variable. TN and TP concentrations were consistently very high, as is also usual for

this catchment. The June TN and NH3 were unusually high when compared to the

background data but that could be due to the fact there was only one data point for

that month and also that there isn’t a lot of background data (shown by the fact there

are no whisker lines for June).



9 Helena R (SWN10)

SWN10 (HELENA) TN


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

n=1 n=1 n=0 n=0 n=1 n=6 n=12 n=12 n=10 n=9 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWN10 (Helena R).

SWN10 (HELENA) NH3-N


NH

3-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

n=1 n=1 n=0 n=0 n=1 n=6 n=12 n=12 n=10 n=9 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN10 (HELENA) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

n=1 n=1 n=0 n=0 n=1 n=6 n=12 n=12 n=10 n=9 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWN10 (Helena R).

SWN10 (HELENA) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

n=1 n=1 n=0 n=0 n=1 n=6 n=12 n=12 n=10 n=9 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN10 (HELENA) TP


TP

(m

g L

-1)

0.00

0.01

0.02

0.03

0.04

0.05

0.06

n=1 n=1 n=0 n=0 n=1 n=6 n=12 n=12 n=10 n=9 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN10 (HELENA) SRP


SR

P (

mg L

-1)

0.000

0.005

0.010

0.015

0.020

n=1 n=1 n=0 n=0 n=1 n=6 n=12 n=12 n=10 n=9 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN10 (HELENA) DOC


DO

C (

mg L

-1)

0

2

4

6

8

10

12

14

n=1 n=1 n=0 n=0 n=1 n=6 n=12 n=12 n=10 n=9 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN10 (HELENA) TSS


TS

S (

mg L

-1)

0

5

10

15

20

25

30

n=1 n=1 n=0 n=0 n=1 n=6 n=12 n=12 n=10 n=9 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90



July was 36mgL-1



SWN10 (HELENA) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

n=1 n=1 n=0 n=0 n=1 n=6 n=12 n=12 n=10 n=9 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN10 (HELENA) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.5

1.0

1.5

2.0

2.5

n=1 n=1 n=0 n=0 n=1 n=6 n=12 n=12 n=10 n=9 n=8 n=7

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Figure 98 2015 Helena R flow (616086) – Daily discharge hydrograph measured in megalitres

0

10

20

30

40

50

60

Da

ily

dis

cha

rge

(M

L)

Date

Helena River (SWN10) 2015 flow



Table 12 2015 monthly sample numbers, minimum and maximum values at SWN10 (Helena R).


TN (mg L-1)

n 0 0 0 0 1 3 2 2 2 2 2 0

min - - - - 1.00 0.98 0.73 0.64 0.56 0.80 0.86 -

max - - - - 1.00 2.40 0.98 0.88 0.77 0.89 0.95 -

med - - - - 1.00 1.60 0.86 0.76 0.67 0.85 0.91 -

NH3-N (mg L-1)

n 0 0 0 0 1 3 2 2 2 2 2 0

min - - - - 0.32 0.60 0.24 0.072 0.11 0.18 0.31 -

max - - - - 0.32 1.30 0.62 0.120 0.12 0.24 0.42 -

med - - - - 0.32 1.10 0.43 0.096 0.12 0.21 0.37 -

NOx-N (mg L-1)

n 0 0 0 0 1 3 2 2 2 2 2 0

min - - - - 0.29 <0.01 0.038 0.21 0.19 0.14 0.079 -

max - - - - 0.29 0.023 0.170 0.35 0.19 0.14 0.084 -

med - - - - 0.29 0.014 0.104 0.28 0.19 0.14 0.082 -

DOrgN (mg L-1)

n 0 0 0 0 1 3 2 2 2 2 2 0

min - - - - 0.34 0.36 0.20 0.28 0.26 0.28 0.38 -

max - - - - 0.34 0.50 0.31 0.38 0.33 0.40 0.43 -

med - - - - 0.34 0.41 0.26 0.33 0.30 0.34 0.41 -

TP (mg L-1)

n 0 0 0 0 1 3 2 2 2 2 2 0

min - - - - 0.022 <0.005 0.021 0.022 0.014 0.021 0.021 -

max - - - - 0.022 0.031 0.021 0.029 0.016 0.038 0.036 -

med - - - - 0.022 0.017 0.021 0.026 0.015 0.030 0.029 -

SRP (mg L-1)

n 0 0 0 0 1 3 2 2 2 2 2 0

min - - - - 0.009 <0.005 0.011 0.009 0.007 0.006 <0.005 -

max - - - - 0.009 0.008 0.012 0.013 0.008 0.008 0.008 -

med - - - - 0.009 0.006 0.012 0.011 0.008 0.007 0.005 -

DOC (mg L-1)

n 0 0 0 0 1 3 2 2 2 2 2 0

min - - - - 8 8 7 8 8 9 9 -

max - - - - 8 14 8 10 8 11 9 -

med - - - - 8 9 7.5 9 8 10 9 -

TSS (mg L-1)

n 0 0 0 0 1 3 2 2 2 2 2 0

min - - - - 2 6 8 3 4 8 6 -

max - - - - 2 54 26 4 5 39 19 -

med - - - - 2 16 17 3.5 4.5 23.5 12.5 -



DO (mg L-1)

n 0 0 0 0 1 3 2 2 2 2 2 0

min - - - - 3.78 0.45 3.20 5.67 4.58 2.79 1.77 -

max - - - - 3.78 2.87 4.32 6.25 5.15 3.17 3.15 -

med - - - - 3.78 2.50 3.76 5.96 4.87 2.98 2.46 -


n 0 0 0 0 1 3 2 2 2 2 2 0

min - - - - 1.108 1.156 0.787 0.686 0.998 1.426 1.249 -

max - - - - 1.108 1.762 1.233 0.844 1.155 1.495 1.422 -

med - - - - 1.108 1.563 1.010 0.765 1.077 1.461 1.336 -

The Helena River hydrograph shows a slightly more riverine flow regime than smaller

and more urbanised catchments. The lower than usual dissolved oxygen recorded

during between September and November could possibly be due to reduced flows;

but the water temperature also rose by 7.5ºC between September and November

and that would also have an effect on the dissolved oxygen concentration in the

water. TSS was particularly variable in the Helena River but there is much evidence

of that in background data too.

The difference between the June data and the background plot for some analytes

may simply be due to lack of background data and may only be normal variability,

which is more noticeable in this catchment than some. The 2015 DOC data was often

higher than the 90th percentile (where there was sufficient data to plot them) of the

background data.



10 Jane Bk (SWN7)

SWN7 (JANE BK) TN


TN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

n=0 n=0 n=0 n=0 n=0 n=6 n=12 n=12 n=10 n=10 n=7 n=6

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWN7 (Jane Bk).

SWN7 (JANE BK) NH3-N


NH

3-N

(m

g L

-1)

0.00

0.05

0.10

0.15

0.20

n=0 n=0 n=0 n=0 n=0 n=6 n=12 n=12 n=10 n=10 n=7 n=6

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN7 (JANE BK) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=0 n=0 n=0 n=0 n=0 n=6 n=12 n=12 n=10 n=10 n=7 n=6

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWN7 (Jane Bk).

SWN7 (JANE BK) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

n=0 n=0 n=0 n=0 n=0 n=6 n=12 n=12 n=10 n=10 n=7 n=6

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN7 (JANE BK) TP


TP

(m

g L

-1)

0.00

0.02

0.04

0.06

0.08

0.10

n=0 n=0 n=0 n=0 n=0 n=6 n=12 n=12 n=10 n=10 n=7 n=6

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN7 (JANE BK) SRP


SR

P (

mg L

-1)

0.00

0.01

0.02

0.03

0.04

0.05

0.06

n=0 n=0 n=0 n=0 n=0 n=6 n=12 n=12 n=10 n=10 n=7 n=6

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN7 (JANE BK) DOC


DO

C (

mg L

-1)

0

2

4

6

8

10

12

n=0 n=0 n=0 n=0 n=0 n=6 n=12 n=12 n=10 n=10 n=7 n=6

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN7 (JANE BK) TSS


TS

S (

mg L

-1)

0

5

10

15

20

25

30

n=0 n=0 n=0 n=0 n=0 n=6 n=12 n=12 n=10 n=10 n=6 n=6

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWN7 (JANE BK) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

n=0 n=0 n=0 n=0 n=0 n=6 n=12 n=12 n=10 n=10 n=7 n=6

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN7 (JANE BK) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

n=0 n=0 n=0 n=0 n=0 n=6 n=12 n=12 n=10 n=10 n=7 n=6

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Figure 109 2015 Jane Bk flow (616088) – Daily discharge hydrograph measured in megalitres

0

10

20

30

40

50

60

Da

ily

dis

cha

rge

(M

L)

Date

Jane Bk (SWN7) 2015 flow



Table 13 2015 monthly sample numbers, minimum and maximum values at SWN7 (Jane Bk).


TN (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 2 3

min - - - - - 0.37 0.24 0.52 0.50 0.29 0.36 0.20

max - - - - - 0.37 0.39 0.63 0.68 0.41 0.52 0.37

med - - - - - 0.37 0.32 0.58 0.59 0.35 0.44 0.21

NH3-N (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 2 3

min - - - - - 0.028 0.024 0.013 0.019 0.027 <0.01 0.012

max - - - - - 0.028 0.031 0.032 0.021 0.043 0.037 0.027

med - - - - - 0.028 0.028 0.023 0.020 0.035 0.021 0.023

NOx-N (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 2 3

min - - - - - <0.01 0.016 0.27 0.33 0.033 <0.01 <0.01

max - - - - - <0.01 0.200 0.41 0.34 0.120 0.048 0.011

med - - - - - <0.01 0.108 0.34 0.34 0.077 0.027 <0.01

DOrgN (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 2 3

min - - - - - 0.29 0.15 0.19 0.13 0.16 0.22 0.074

max - - - - - 0.29 0.17 0.19 0.20 0.24 0.37 0.260

med - - - - - 0.29 0.16 0.19 0.17 0.20 0.30 0.096

TP (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 2 3

min - - - - - 0.019 0.011 0.012 <0.005 0.012 0.023 0.019

max - - - - - 0.019 0.014 0.016 0.007 0.016 0.028 0.035

med - - - - - 0.019 0.013 0.014 0.005 0.014 0.026 0.027

SRP (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 2 3

min - - - - - 0.01 0.006 0.007 <0.005 0.006 <0.005 <0.005

max - - - - - 0.01 0.010 0.007 <0.005 0.006 0.007 0.007

med - - - - - 0.01 0.008 0.007 <0.005 0.006 0.005 0.006

DOC (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 2 3

min - - - - - 7 5 5 5 6 4 5

max - - - - - 7 6 5 5 6 8 6

med - - - - - 7 5.5 5 5 6 6 5

TSS (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 2 3

min - - - - - 2 <1 1 <1 1 3 8

max - - - - - 2 <1 2 <1 8 9 12

med - - - - - 2 <1 1.5 <1 4.5 6 8



DO (mg L-1)

n 0 0 0 0 0 1 2 2 2 2 2 3

min - - - - - 2.36 2.93 7.72 7.13 1.82 0.78 1.03

max - - - - - 2.36 5.64 7.88 7.26 4.56 3.64 2.14

med - - - - - 2.36 4.29 7.80 7.20 3.19 2.21 1.48


n 0 0 0 0 0 1 2 2 2 2 2 3

min - - - - - 0.787 0.817 0.783 0.836 1.061 0.874 1.121

max - - - - - 0.787 0.967 0.869 0.886 1.146 1.161 1.217

med - - - - - 0.787 0.892 0.826 0.861 1.104 1.018 1.129

Jane Brook only flowed for a relatively short period (presumably due to the dry

winter), between July and November. The 2015 TN concentrations were relatively

low; this pattern was reflected in the NOx and dissolved organic nitrogen

concentrations. TP concentrations were also relatively low during 2015 but not as

noticeably as for TN.

TSS concentrations were slightly elevated compared to the background data,

possibly due to the pulses of flow that characterised the 2015 Jane Brook hydrograph

and that type of intermittent high flow can mobilise laterite based clays on the scarp

down through the catchment.

Dissolved oxygen concentrations were lower than the background data for the last

three months of the year; during this time the flow at the sampling site decreased

rapidly as the water temperature increased (from 14ºC in late September to 22ºC by

the end of December).



11 Mills Street MD (SWS1)

SWS1 (MILLS ST) TN


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

n=12 n=10 n=10 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWS1 (Mills St MD).

SWS1 (MILLS ST) NH3-N


NH

3-N

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

n=12 n=10 n=10 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS1 (MILLS ST) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

n=12 n=10 n=10 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWS1 (Mills St MD).

SWS1 (MILLS ST) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=12 n=10 n=10 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS1 (MILLS ST) TP


TP

(m

g L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

n=12 n=10 n=10 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS1 (MILLS ST) SRP


SR

P (m

gL

-1)

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

n=12 n=10 n=10 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWS1 (Mills St

MD).


June was 0.55mgL-1


Aug was 0.22mgL-1



SWS1 (MILLS ST) DOC


DO

C (

mg L

-1)

0

5

10

15

20

25

n=12 n=10 n=10 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS1 (MILLS ST) TSS


TS

S (

mg L

-1)

0

5

10

15

20

25

30

n=12 n=10 n=10 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



June was 201mgL-1



SWS1 (MILLS ST) DO


DO

(m

g L

-1)

0

2

4

6

8

10

n=12 n=10 n=10 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS1 (MILLS ST) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=12 n=10 n=10 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Figure 120 2015 Mills St MD flow (616043) – Daily discharge hydrograph measured in megalitres

0

20

40

60

80

100

120

Da

ily

dis

cha

rge

(M

L)

Date

Mills St MD (SWS1) 2015 flow



Table 14 2015 monthly sample numbers, minimum and maximum values at SWS1 (Mills St MD).


TN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.88 0.97 0.78 1.1 0.58 1.1 0.86 0.5 0.92 0.84 0.54 0.59

max 1.70 1.10 1.10 1.1 1.70 1.8 1.30 1.1 1.00 1.10 0.67 0.79

med 1.29 1.04 0.94 1.1 1.14 1.4 1.08 0.8 0.96 0.97 0.61 0.61

NH3-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min <0.01 0.019 0.014 0.064 0.087 0.22 0.063 <0.01 0.099 <0.01 0.011 0.012

max 0.650 0.110 0.130 0.210 0.390 0.33 0.280 0.150 0.120 0.045 0.071 0.026

med 0.328 0.065 0.072 0.137 0.239 0.31 0.172 0.078 0.110 0.025 0.041 0.016

NOx-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.011 0.033 0.010 0.12 0.17 0.29 0.26 0.20 0.17 0.071 <0.01 <0.01

max 0.084 0.076 0.099 0.18 0.43 0.54 0.49 0.39 0.29 0.180 0.087 <0.01

med 0.048 0.055 0.055 0.15 0.30 0.36 0.38 0.30 0.23 0.126 0.046 <0.01

DOrgN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.58 0.59 0.55 0.47 0.24 0.51 0.35 0.29 0.36 0.55 0.41 0.51

max 0.62 0.60 0.61 0.49 0.62 0.60 0.40 0.43 0.60 0.67 0.47 0.78

med 0.60 0.60 0.58 0.48 0.43 0.54 0.38 0.36 0.48 0.61 0.44 0.51

TP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.12 0.16 0.14 0.085 0.096 0.097 0.091 0.044 0.066 0.081 0.035 0.031

max 0.12 0.18 0.17 0.240 0.098 0.310 0.095 0.099 0.069 0.110 0.140 0.069

med 0.12 0.17 0.16 0.163 0.097 0.098 0.093 0.072 0.068 0.096 0.088 0.052

SRP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.025 0.045 0.033 0.026 0.032 0.024 0.024 0.016 0.017 0.024 0.010 0.006

max 0.026 0.059 0.059 0.076 0.049 0.073 0.031 0.029 0.024 0.031 0.062 0.023

med 0.026 0.052 0.046 0.051 0.041 0.037 0.028 0.023 0.021 0.028 0.036 0.012

DOC (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 14 15 15 9 5 11 12 6 9 15 9 14

max 19 16 16 11 11 20 12 11 14 16 15 16

med 16.5 15.5 15.5 10 8 13 12 8.5 11.5 15.5 12 15

TSS (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 12 8 7 7 4 3 3 6 1 3 <1 1

max 12 13 18 24 4 20 5 6 3 4 3 2

med 12 10.5 12.5 15.5 4 8 4 6 2 3.5 1.8 2



DO (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 1.96 3.25 4.56 4.93 6.95 6.04 5.90 6.09 6.91 6.94 3.81 3.10

max 2.85 4.46 4.97 6.54 8.19 8.30 6.07 7.62 7.48 7.70 6.50 6.40

med 2.41 3.86 4.77 5.74 7.57 6.41 5.99 6.86 7.20 7.32 5.16 6.22


n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.813 0.537 0.608 0.189 0.174 0.254 0.577 0.254 0.473 0.637 0.260 0.679

max 0.834 0.767 0.760 0.656 0.535 0.716 0.600 0.479 0.652 0.654 0.708 0.775

med 0.824 0.652 0.684 0.423 0.355 0.650 0.589 0.367 0.563 0.646 0.484 0.744

Mills St MD 2015 data was generally similar to that recorded over the previous five

years of background data.

The only deviation from this was the slightly elevated TSS, TP and SRP recorded in

April. This most likely was a result of a rain driven flow event in the second week of

April.

The slightly lower DOC recorded in April may also be due to the same flow event, or

could just be natural variation as the April background plot is much ‘tighter’ than it is

for adjacent months



12 S. Belmont MD (SWS13)

SWS13 (S.BELMONT) TN


TN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWS13 (S. Belmont MD).

SWS13 (S.BELMONT) NH3-N


NH

3-N

(m

g L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



Feb was 3.85mgL-1



SWS13 (S.BELMONT) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWS13 (S. Belmont

MD).

SWS13 (S.BELMONT) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


MD).


Feb was 3.29mgL-1



SWS13 (S.BELMONT) TP


TP

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS13 (S.BELMONT) SRP


SR

P (

mg L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


MD).



SWS13 (S.BELMONT) DOC


DO

C (

mg L

-1)

0

5

10

15

20

25

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


MD).

SWS13 (S.BELMONT) TSS


TS

S (

mg L

-1)

0

5

10

15

20

25

30

35

40

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



Feb was 168mgL-1



SWS13 (S.BELMONT) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

n=12 n=9 n=12 n=10 n=10 n=9 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS13 (S.BELMONT) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.5

1.0

1.5

2.0

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



March was 2.98mScm-1


Feb was 3.72mScm-1



Figure 131 2015 S. Belmont MD flow (616133) – Daily discharge hydrograph measured in megalitres

0

10

20

30

40

50

60

Da

ily

dis

cha

rge

(M

L)

Date

S. Belmont MD (SWS13) 2015 flow



Table 15 2015 monthly sample numbers, minimum and maximum values at SWS13 (S. Belmont MD).


TN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.46 0.56 0.53 0.54 0.82 0.84 0.68 0.99 0.84 0.71 0.63 0.59

max 0.54 0.72 0.64 0.75 0.84 1.00 0.88 1.10 0.91 0.79 0.72 0.68

med 0.50 0.64 0.59 0.65 0.83 0.90 0.78 1.05 0.88 0.75 0.68 0.62

NH3-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.02 0.035 0.047 0.038 0.13 0.081 0.10 0.11 0.029 <0.01 0.030 0.031

max 0.043 0.064 0.072 0.088 0.20 0.140 0.11 0.13 0.046 0.053 0.035 0.038

med 0.032 0.050 0.060 0.063 0.17 0.140 0.11 0.12 0.038 0.029 0.033 0.034

NOx-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.046 0.064 0.087 0.065 0.10 0.15 0.21 0.26 0.16 0.090 0.035 0.045

max 0.066 0.080 0.091 0.130 0.12 0.22 0.21 0.34 0.21 0.092 0.054 0.069

med 0.056 0.072 0.089 0.098 0.11 0.21 0.21 0.30 0.19 0.091 0.045 0.063

DOrgN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.35 0.40 0.37 0.31 0.45 0.53 0.37 0.54 0.49 0.57 0.55 0.46

max 0.45 0.55 0.40 0.51 0.60 0.63 0.44 0.60 0.56 0.57 0.56 0.53

med 0.40 0.48 0.39 0.41 0.53 0.58 0.41 0.57 0.53 0.57 0.56 0.47

TP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.14 0.17 0.10 0.094 0.110 0.12 0.11 0.13 0.12 0.093 0.110 0.11

max 0.15 0.40 0.14 0.140 0.120 0.15 0.13 0.15 0.13 0.110 0.120 0.13

med 0.15 0.29 0.12 0.117 0.115 0.13 0.12 0.14 0.13 0.102 0.115 0.11

SRP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.095 0.120 0.067 0.037 0.075 0.066 0.057 0.093 0.076 0.058 0.073 0.026

max 0.100 0.310 0.090 0.100 0.078 0.100 0.088 0.110 0.087 0.060 0.073 0.077

med 0.098 0.215 0.079 0.069 0.077 0.078 0.073 0.102 0.082 0.059 0.073 0.065

DOC (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 11 12 11 8 11 11 9 14 15 16 15 13

max 13 14 12 12 12 17 17 16 16 17 16 15

med 12 13 11.5 10 11.5 13 13 15 15.5 16.5 15.5 15

TSS (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 1 2 1 2 2 3 3 1 1 1 1 1

max 1 2 1 2 2 4 7 1 2 4 4 7

med 1 2 1 2 2 3 5 1 1.5 2.5 2.5 2



DO (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 4.16 4.20 4.71 4.71 5.27 5.77 6.73 7.08 7.14 6.41 5.55 5.13

max 4.52 5.68 5.66 5.11 7.33 6.27 8.17 7.42 7.43 6.68 5.88 5.24

med 4.34 4.94 5.19 4.91 6.30 5.82 7.45 7.25 7.29 6.55 5.72 5.24


n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.654 0.650 0.634 0.315 0.587 0.478 0.397 0.683 0.756 0.743 0.630 0.680

max 0.694 0.679 0.646 0.723 0.684 0.768 0.757 0.73 0.769 0.768 0.739 0.732

med 0.674 0.665 0.640 0.519 0.636 0.762 0.577 0.707 0.763 0.756 0.685 0.727

The South Belmont MD data during 2015 was generally similar to the past 5 years of

background data with the exception of elevated TN and TP in August, apparently due

to higher than normal NOx, NH3 and SRP; and DOC, which was elevated during

spring; with for no obvious reason for either observed derivation from background

data, other than being natural variation of highly variable measured parameters in a

dynamic system.



13 Southern R (SWS7)

SWS7 (SOUTHERN R.) TN


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWS7 (Southern R).

SWS7 (SOUTHERN R.) NH3-N


NH

3-N

(m

g L

-1)

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



March was 0.55mgL-1


May was 0.37mgL-1



SWS7 (SOUTHERN R.) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWS7 (Southern R).

SWS7 (SOUTHERN R.) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS7 (SOUTHERN R.) TP


TP

(m

g L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS7 (SOUTHERN R.) SRP


SR

P (

mg L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



March was 0.51mgL-1



SWS7 (SOUTHERN R.) DOC


DO

C (

mg L

-1)

0

5

10

15

20

25

30

35

40

45

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS7 (SOUTHERN R.) TSS


TS

S (

mg L

-1)

0

5

10

15

20

25

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90



July was 33mgL-1



SWS7 (SOUTHERN R.) DO


DO

(m

g L

-1)

0

2

4

6

8

10

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=9 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS7 (SOUTHERN R.) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

n=12 n=10 n=12 n=10 n=10 n=10 n=13 n=12 n=10 n=10 n=9 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Figure 142 2015 Southern R flow (616092) – Daily discharge hydrograph measured in megalitres

0

50

100

150

200

250

300

Da

ily

dis

cha

rge

(M

L)

Date

Southern R (SWS7) 2015 flow



Table 16 2015 monthly sample numbers, minimum and maximum values at SWS7 (Southern R).


TN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.72 0.86 0.70 0.65 0.84 0.91 1.50 1.60 1.4 1.40 1.10 1.1

max 0.97 1.10 1.10 1.00 1.10 1.80 1.80 1.70 1.4 1.50 1.20 1.3

med 0.85 0.98 0.90 0.83 0.97 1.10 1.65 1.65 1.4 1.45 1.15 1.2

NH3-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.04 0.053 0.050 0.033 0.033 0.046 0.051 0.012 0.014 0.012 0.025 0.039

max 0.04 0.056 0.067 0.070 0.053 0.092 0.052 0.052 0.023 0.016 0.028 0.042

med 0.04 0.055 0.059 0.052 0.043 0.052 0.052 0.032 0.019 0.014 0.027 0.042

NOx-N (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.14 0.11 0.062 0.14 0.084 0.18 0.64 0.71 0.43 0.28 0.15 0.15

max 0.17 0.15 0.140 0.16 0.380 0.85 0.92 0.72 0.49 0.32 0.15 0.16

med 0.16 0.13 0.101 0.15 0.232 0.30 0.78 0.72 0.46 0.30 0.15 0.15

DOrgN (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.54 0.65 0.51 0.35 0.55 0.52 0.65 0.78 0.62 1.0 0.65 0.89

max 0.69 0.75 0.85 0.79 0.66 0.85 0.78 0.87 0.95 1.2 0.99 0.97

med 0.62 0.70 0.68 0.57 0.61 0.83 0.72 0.83 0.79 1.1 0.82 0.91

TP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.22 0.20 0.16 0.120 0.110 0.082 0.080 0.100 0.086 0.17 0.13 0.16

max 0.24 0.20 0.20 0.130 0.140 0.100 0.092 0.110 0.120 0.19 0.18 0.21

med 0.23 0.20 0.18 0.125 0.125 0.100 0.086 0.105 0.103 0.18 0.16 0.17

SRP (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.15 0.14 0.13 0.061 0.064 0.052 0.050 0.053 0.050 0.087 0.072 0.068

max 0.16 0.14 0.13 0.100 0.095 0.062 0.052 0.068 0.061 0.093 0.110 0.100

med 0.16 0.14 0.13 0.081 0.080 0.053 0.051 0.061 0.056 0.090 0.091 0.090

DOC (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 20 21 18 10 12 10 23 19 23 29 19 28

max 21 22 30 24 20 25 24 22 28 32 35 34

med 20.5 21.5 24 17 16 23 23.5 20.5 25.5 30.5 27 31

TSS (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 3 4 2 4 <1 2 1 4 2 1 2 2

max 3 5 3 8 15 7 3 8 4 1 3 3

med 3 4.5 2.5 6 7.75 3 2 6 3 1 2.5 3



DO (mg L-1)

n 2 2 2 2 2 3 2 2 2 2 2 3

min 2.22 2.01 1.98 3.52 4.40 5.88 8.34 8.08 6.90 6.48 4.62 2.82

max 3.61 2.30 2.96 3.98 7.43 7.23 8.41 8.49 7.87 6.48 6.26 4.66

med 2.92 2.16 2.47 3.75 5.92 6.58 8.38 8.29 7.39 6.48 5.44 4.41


n 2 2 2 2 2 3 2 2 2 2 2 3

min 0.959 0.835 0.964 0.410 0.434 0.355 0.345 0.502 0.647 0.887 0.516 1.025

max 0.983 0.937 1.083 0.996 0.927 0.781 0.768 0.525 0.776 0.900 0.998 1.078

med 0.971 0.886 1.024 0.703 0.681 0.771 0.557 0.514 0.712 0.894 0.757 1.072

The Southern River data for 2015 was fairly similar to the background plot of the

previous 5 years of data, with some variation, which the background data

demonstrates is normal in this catchment.



14 Susannah Bk (SWN11)

SWN11 (SUSANNAH BK) TN


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

n=0 n=0 n=0 n=0 n=0 n=2 n=10 n=12 n=9 n=8 n=5 n=1

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWN11 (Susannah Bk).

SWN11 (SUSANNAH BK) NH3-N


NH

3-N

(m

g L

-1)

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

n=0 n=0 n=0 n=0 n=0 n=2 n=10 n=12 n=9 n=8 n=5 n=1

2010-2014 data

2015 data



th, 75

th, 10

th and 90



July was 4.22mgL-1



SWN11 (SUSANNAH BK) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

n=0 n=0 n=0 n=0 n=0 n=2 n=10 n=12 n=9 n=8 n=5 n=1

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWN11 (Susannah

Bk).

SWN11 (SUSANNAH BK) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

n=0 n=0 n=0 n=0 n=0 n=2 n=10 n=12 n=9 n=8 n=5 n=1

2010-2014 data

2015 data



th, 75

th, 10

th and 90


Bk).


July was 4.08mgL-1



SWN11 (SUSANNAH BK) TP


TP

(m

g L

-1)

0.00

0.02

0.04

0.06

0.08

0.10

n=0 n=0 n=0 n=0 n=0 n=2 n=10 n=12 n=9 n=8 n=5 n=1

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN11 (SUSANNAH BK) SRP


SR

P (

mg L

-1)

0.000

0.005

0.010

0.015

0.020

0.025

n=0 n=0 n=0 n=0 n=0 n=2 n=10 n=12 n=9 n=8 n=5 n=1

2010-2014 data

2015 data



th, 75

th, 10

th and 90


Bk).


July was 0.173mgL-1



SWN11 (SUSANNAH BK) DOC


DO

C (

mg L

-1)

0

5

10

15

20

25

n=0 n=0 n=0 n=0 n=0 n=2 n=10 n=12 n=9 n=8 n=5 n=1

2010-2014 data

2015 data



th, 75

th, 10

th and 90


Bk).

SWN11 (SUSANNAH BK) TSS


TS

S (

mg L

-1)

0

10

20

30

40

50

60

70

80

90

n=0 n=0 n=0 n=0 n=0 n=2 n=10 n=12 n=9 n=8 n=5 n=1

2010-2014 data

2015 data



th, 75

th, 10

th and 90



July was 243mgL-1



SWN11 (SUSANNAH BK) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

n=0 n=0 n=0 n=0 n=0 n=2 n=10 n=12 n=9 n=8 n=5 n=1

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWN11 (SUSANNAH BK) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

n=0 n=0 n=0 n=0 n=0 n=2 n=10 n=12 n=9 n=8 n=5 n=1

2010-2014 data

2015 data



th, 75

th, 10

th and 90




Figure 153 2015 Susannah Bk flow (616099) – Daily discharge hydrograph measured in megalitres

0

5

10

15

20

25

30

35

40

45

50

Da

ily

dis

cha

rge

(M

L)

Date

Susannah Bk (SWN11) 2015 flow



Table 17 2015 monthly sample numbers, minimum and maximum values at SWN11 (Susannah Bk).


TN (mg L-1)

n 0 0 0 0 0 0 0 2 2 1 0 0

min - - - - - - - 0.40 0.36 0.84 - -

max - - - - - - - 0.50 0.44 0.84 - -

med - - - - - - - 0.45 0.40 0.84 - -

NH3-N (mg L-1)

n 0 0 0 0 0 0 0 2 2 1 0 0

min - - - - - - - 0.013 0.015 0.13 - -

max - - - - - - - 0.033 0.024 0.13 - -

med - - - - - - - 0.023 0.020 0.13 - -

NOx-N (mg L-1)

n 0 0 0 0 0 0 0 2 2 1 0 0

min - - - - - - - 0.12 0.056 0.088 - -

max - - - - - - - 0.24 0.065 0.088 - -

med - - - - - - - 0.18 0.061 0.088 - -

DOrgN (mg L-1)

n 0 0 0 0 0 0 0 2 2 1 0 0

min - - - - - - - 0.23 0.27 0.5 - -

max - - - - - - - 0.26 0.28 0.5 - -

med - - - - - - - 0.25 0.28 0.5 - -

TP (mg L-1)

n 0 0 0 0 0 0 0 2 2 1 0 0

min - - - - - - - 0.012 0.008 0.044 - -

max - - - - - - - 0.014 0.008 0.044 - -

med - - - - - - - 0.013 0.008 0.044 - -

SRP (mg L-1)

n 0 0 0 0 0 0 0 2 2 1 0 0

min - - - - - - - 0.006 <0.005 0.011 - -

max - - - - - - - 0.006 0.006 0.011 - -

med - - - - - - - 0.006 0.004 0.011 - -

DOC (mg L-1)

n 0 0 0 0 0 0 0 2 2 1 0 0

min - - - - - - - 6 6 13 - -

max - - - - - - - 7 6 13 - -

med - - - - - - - 6.5 6 13 - -

TSS (mg L-1)

n 0 0 0 0 0 0 0 2 2 1 0 0

min - - - - - - - <1 <1 4 - -

max - - - - - - - <1 1 4 - -

med - - - - - - - <1 0.75 4 - -



DO (mg L-1)

n 0 0 0 0 0 0 0 2 2 1 0 0

min - - - - - - - 7.33 6.64 1.72 - -

max - - - - - - - 7.64 7.08 1.72 - -

med - - - - - - - 7.49 6.86 1.72 - -


n 0 0 0 0 0 0 0 2 2 1 0 0

min - - - - - - - 0.777 0.807 0.940 - -

max - - - - - - - 0.909 0.820 0.940 - -

med - - - - - - - 0.843 0.814 0.940 - -

The most noticeable thing about Susannah Brook in 2015 was the lack of flow; the

site only flowed for 10 weeks in spring, between August and October. Past data has

tended to exhibit high variability and 2015 was fairly similar in that regard.

The lower than usual TN (August and September) was matched by the NOx data

over the same period. However the TN data during October was then higher than

previous data possibly driven by higher than usual NH3 and dissolved organic

nitrogen data. The TP and SRP data during the same month was noticeably higher

than the past data but the actual concentrations are very low.



15 Yule Bk (SWS3)

SWS3 (YULE BK) TN


TN

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

n=11 n=5 n=6 n=9 n=9 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at site SWS3 (Yule Bk).

SWS3 (YULE BK) NH3-N


NH

3-N

(m

g L

-1)

0.0

0.5

1.0

1.5

2.0

n=11 n=5 n=6 n=9 n=9 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS3 (YULE BK) NOx-N


NO

x-N

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

n=11 n=5 n=6 n=9 n=9 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90

th percentiles, at SWS3 (Yule Bk).

SWS3 (YULE BK) DOrgN


DO

rgN

(m

g L

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

n=11 n=5 n=6 n=9 n=9 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS3 (YULE BK) TP


TP

(m

g L

-1)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

n=11 n=5 n=6 n=9 n=9 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS3 (YULE BK) SRP


SR

P (

mg L

-1)

0.00

0.05

0.10

0.15

0.20

0.25

0.30

n=11 n=5 n=6 n=9 n=9 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS3 (YULE BK) DOC


DO

C (

mg L

-1)

0

5

10

15

20

25

30

n=11 n=5 n=6 n=9 n=9 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS3 (YULE BK) TSS


TS

S (

mg L

-1)

0

5

10

15

20

25

30

35

40

45

50

55

60

65

70

75

n=11 n=5 n=6 n=9 n=9 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90




SWS3 (YULE BK) DO


DO

(m

g L

-1)

0

2

4

6

8

10

12

n=11 n=5 n=6 n=9 n=9 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

th, 10

th and 90


SWS3 (YULE BK) Sp. Conductivity


Sp.

Cond (

mS

cm

-1)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

n=11 n=5 n=6 n=9 n=9 n=10 n=13 n=12 n=10 n=10 n=10 n=12

2010-2014 data

2015 data



th, 75

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th and 90




Figure 164 2015 Yule Bk flow (616042) – Daily discharge hydrograph measured in megalitres

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Table 18 2015 monthly sample numbers, minimum and maximum values at SWS3 (Yule Bk).


TN (mg L-1)

n 1 2 1 2 2 3 2 2 2 2 2 2

min 0.94 1.7 1.5 0.84 0.65 0.8 0.69 0.87 0.71 0.83 0.70 0.77

max 0.94 4.6 1.5 2.00 1.20 1.3 0.86 1.00 0.95 1.40 1.00 0.81

med 0.94 3.2 1.5 1.42 0.93 1.0 0.78 0.94 0.83 1.12 0.85 0.79

NH3-N (mg L-1)

n 1 2 1 2 2 3 2 2 2 2 2 2

min 0.01 0.44 0.69 0.120 0.058 0.015 0.1 0.014 <0.01 0.094 0.023 0.032

max 0.01 3.50 0.69 0.170 0.260 0.150 0.1 0.044 0.037 0.520 0.190 0.037

med 0.01 1.97 0.69 0.145 0.159 0.120 0.1 0.029 0.021 0.307 0.107 0.035

NOx-N (mg L-1)

n 1 2 1 2 2 3 2 2 2 2 2 2

min <0.01 <0.01 0.042 0.065 0.140 0.14 0.32 0.46 0.26 0.12 <0.01 0.010

max <0.01 0.010 0.042 0.270 0.250 0.50 0.47 0.68 0.42 0.12 0.110 0.016

med <0.01 0.008 0.042 0.168 0.195 0.31 0.40 0.57 0.34 0.12 0.058 0.013

DOrgN (mg L-1)

n 1 2 1 2 2 3 2 2 2 2 2 2

min 0.77 0.73 0.72 0.540 0.250 0.34 0.22 0.29 0.20 0.570 0.44 0.62

max 0.77 0.96 0.72 0.750 0.680 0.63 0.29 0.31 0.38 0.620 0.48 0.66

med 0.77 0.85 0.72 0.645 0.465 0.49 0.26 0.30 0.29 0.595 0.46 0.64

TP (mg L-1)

n 1 2 1 2 2 3 2 2 2 2 2 2

min 0.19 0.32 0.14 0.180 0.091 0.083 0.061 0.042 0.044 0.077 0.097 0.210

max 0.19 0.92 0.14 0.350 0.140 0.130 0.082 0.045 0.049 0.120 0.190 0.220

med 0.19 0.62 0.14 0.265 0.116 0.085 0.072 0.044 0.047 0.099 0.144 0.215

SRP (mg L-1)

n 1 2 1 2 2 3 2 2 2 2 2 2

min 0.073 0.14 0.057 0.065 0.046 0.037 0.030 0.015 0.013 0.026 0.047 0.065

max 0.073 0.38 0.057 0.110 0.076 0.045 0.045 0.022 0.018 0.043 0.095 0.091

med 0.073 0.26 0.057 0.088 0.061 0.039 0.038 0.019 0.016 0.035 0.071 0.078

DOC (mg L-1)

n 1 2 1 2 2 3 2 2 2 2 2 2

min 15 17 18 10 5 7 7 7 7 12 10 14

max 15 17 18 11 10 9 7 7 8 13 13 15

med 15 17 18 10.5 7.5 9 7 7 7.5 12.5 11.5 14.5

TSS (mg L-1)

n 1 2 1 2 2 3 2 2 2 2 2 2

min 4 4 2 5 1 3 2 2 1 1 2 3

max 4 11 2 144 10 8 3 8 3 3 3 5

med 4 7.5 2 74.5 5.5 4 2.5 5 2 2 2.5 4



DO (mg L-1)

n 1 2 1 2 2 3 2 2 2 2 2 2

min 4.50 1.51 4.21 2.44 4.19 4.84 6.74 6.75 6.74 4.75 5.06 3.69

max 4.50 3.20 4.21 2.82 5.70 6.61 7.77 7.25 6.77 5.19 5.43 5.50

med 4.50 2.36 4.21 2.63 4.95 6.34 7.26 7.00 6.76 4.97 5.25 4.60


n 1 2 1 2 2 3 2 2 2 2 2 2

min 1.061 0.834 0.716 0.436 0.237 0.590 0.605 0.411 0.685 0.769 0.546 0.926

max 1.061 0.851 0.716 0.699 0.597 0.758 0.645 0.539 0.716 0.832 0.878 0.977

med 1.061 0.843 0.716 0.568 0.417 0.634 0.625 0.475 0.701 0.801 0.712 0.952

The Yule Brook data during 2015 generally followed the same pattern as the

previous 5 years of data with two notable exceptions:

Firstly, the very obvious spike in TSS in April is assumed to be an artefact of poor

field sampling technique, since there was no major flow event in April to mobilise

particulates nor any mention of an algal bloom in the field notes.

Also, during February there was a clear spike in the TN data (largely due to nitrogen

as ammonia/ammonium) and also in TP and SRP data. This data coincides with a

peak flow event in early February, probably as a result of the rain that fell during that

period (~40mm over a week). Prior to this there had been no rain for two months so

the material that had built up over time in the catchment was washed into the brook.

It is worth considering why this pulse of nutrients was more pronounced in Yule

Brook than other catchments; did Yule Brook received more rain than other areas or

is it due to particular land uses or activities within the catchment?



16 SWANCATCH/SCWQIP data comparison DISCLAIMER: A normal distribution of data is required to confidently predict standard deviation, and with a small sample size of

only six or seven data points the assumption of normality is not necessarily correct.

Table 19 2015 first, second, third & fourth quarters (Jan - Dec) mean ± standard deviation for all SWANCATCH (bold font) and SCWQIP (regular font) sites.

Catchment Site TN NH3-N NOx-N DOrgN TP SRP DOC TSS DO Specific

Conductivity

Avon (Millendon) SWN5 0.90 ± 0.25 0.03 ± 0.02 0.05 ± 0.09 0.68 ± 0.11 0.02 ± 0.01 0.01 ± 0 14.87 ± 2.61 4.13 ± 3.20 6.87 ± 1.91 17.51 ± 5.19

Bannister Creek SWS2 1.20 ± 0.20 0.08 ± 0.12 0.20 ± 0.15 0.78 ± 0.21 0.10 ± 0.03 0.05 ± 0.02 20.96 ± 5.12 5.73 ± 4.24 5.09 ± 2.11 0.81 ± 0.28

Bayswater Main Drain SWS10 1.37 ± 0.26 0.41 ± 0.14 0.42 ± 0.09 0.45 ± 0.12 0.05 ± 0.02 0.01 ± 0.01 12.54 ± 2.32 10.65 ± 6.78 7.36 ± 1.60 0.72 ± 0.12

Bennett Brook SWN12 0.96 ± 0.18 0.04 ± 0.02 0.25 ± 0.16 0.58 ± 0.11 0.06 ± 0.02 0.03 ± 0.01 16.31 ± 2.11 5.19 ± 2.47 6.08 ± 0.88 0.66 ± 0.05

Bickley Brook SWS4 1.14 ± 0.98 0.02 ± 0.02 0.69 ± 0.96 0.36 ± 0.09 0.04 ± 0.02 0.01 ± 0.01 8.94 ± 2.26 2.25 ± 2.33 5.56 ± 1.91 0.87 ± 0.41

Blackadder Creek SWN8 0.79 ± 0.32 0.03 ± 0.02 0.29 ± 0.30 0.42 ± 0.09 0.04 ± 0.02 0.02 ± 0.01 9.06 ± 1.83 2.94 ± 1.55 5.37 ± 2.20 1.16 ± 0.43

Bull Creek SCCIS2 0.77 ± 0.12 0.06 ± 0.04 0.07 ± 0.05 0.58 ± 0.10 0.07 ± 0.03 0.04 ± 0.01 18.58 ± 2.63 2.21 ± 2.32 6.05 ± 1.69 0.70 ± 0.09

BAMDKD 0.88 ± 0.16 0.09 ± 0.05 0.17 ± 0.10 0.58 ± 0.09 0.09 ± 0.04 0.06 ± 0.02 16.42 ± 2.52 1.81 ± 2.46 5.00 ± 1.97 0.63 ± 0.13

Claise Brook MD CB 13 1.21 ± 0.21 0.15 ± 0.10 0.59 ± 0.16 0.29 ± 0.08 0.05 ± 0.02 0.01 ± 0.01 5.68 ± 1.21 5.18 ± 2.56 8.62 ± 1.90 0.74 ± 0.07

Ellen Brook SWN3 2.46 ± 0.51 0.09 ± 0.05 0.04 ± 0.02 1.94 ± 0.42 0.37 ± 0.19 0.21 ± 0.11 46.22 ± 9.74 8.67 ± 7.60 6.06 ± 1.93 2.37 ± 0.56

SWN9 1.37 ± 0.60 0.04 ± 0.01 0.24 ± 0.27 1.02 ± 0.54 0.14 ± 0.08 0.08 ± 0.06 27.62 ± 11.38 4.15 ± 1.43 5.87 ± 1.29 1.08 ± 0.43

Ellis Brook EBGS01 0.35 ± 0.08 0.01 ± 0 0.01 ± 0 0.27 ± 0.01 0.02 ± 0.01 0 ± 0 7.00 ± 0 6.00 ± 7.07 6.74 ± 1.00 0.46 ± 0.01

Helena River SWN10 1.00 ± 0.47 0.41 ± 0.38 0.14 ± 0.10 0.35 ± 0.08 0.02 ± 0.01 0.01 ± 0 9.00 ± 1.75 14.29 ± 15.55 3.55 ± 1.55 1.21 ± 0.31

Helm Street SCCIS4 1.50 ± 0.72 0.03 ± 0.06 0.51 ± 0.69 0.87 ± 0.36 0.06 ± 0.06 0.04 ± 0.04 13.10 ± 5.01 4.31 ± 7.82 5.47 ± 3.05 1.78 ± 1.26

Henley Brook HBBROCK 1.05 ± 0.43 0.04 ± 0.02 0.14 ± 0.13 0.60 ± 0.10 0.08 ± 0.07 0.03 ± 0.02 14.39 ± 2.52 11.89 ± 10.15 7.54 ± 1.45 0.56 ± 0.07

Jane Brook SWN7 0.41 ± 0.15 0.02 ± 0.01 0.13 ± 0.15 0.20 ± 0.08 0.02 ± 0.01 0.01 ± 0 5.57 ± 1.02 4.00 ± 4.05 4.03 ± 2.63 0.98 ± 0.16

Lower Canning SCCIS3 1.68 ± 0.54 0.13 ± 0.14 0.55 ± 0.61 0.81 ± 0.14 0.27 ± 0.15 0.20 ± 0.11 15.69 ± 2.56 8.42 ± 8.79 4.49 ± 2.13 0.98 ± 0.13

Maylands MIMDOUT 0.92 ± 0.17 0.07 ± 0.03 0.39 ± 0.15 0.42 ± 0.12 0.01 ± 0.01 0.01 ± 0 14.67 ± 1.29 1.93 ± 3.14 7.91 ± 0.50 0.93 ± 1.10

Mills Street Main Drain SWS1 1.01 ± 0.36 0.13 ± 0.15 0.18 ± 0.16 0.51 ± 0.12 0.11 ± 0.06 0.03 ± 0.02 13.04 ± 3.59 6.90 ± 6.14 5.78 ± 1.72 0.58 ± 0.20

Perth Airport North SCCIS12 0.74 ± 0.22 0.03 ± 0.01 0.20 ± 0.19 0.43 ± 0.08 0.05 ± 0.04 0.01 ± 0.01 10.88 ± 2.73 7.27 ± 4.49 8.62 ± 1.70 0.53 ± 0.14

Perth Airport South SCCIS11 1.00 ± 0.22 0.03 ± 0.01 0.21 ± 0.18 0.68 ± 0.12 0.05 ± 0.02 0.02 ± 0.01 22.04 ± 5.68 2.50 ± 1.85 5.44 ± 2.13 0.53 ± 0.13



Saint Leonards Creek SCCIN3 2.67 ± 0.93 0.08 ± 0.01 0.04 ± 0.01 2.37 ± 1.19 0.15 ± 0.06 0.07 ± 0.02 56.00 ± 29.60 9.33 ± 13.58 5.89 ± 1.19 0.97 ± 0.05

South Belmont SWS13 0.74 ± 0.16 0.07 ± 0.05 0.13 ± 0.08 0.49 ± 0.09 0.14 ± 0.06 0.09 ± 0.05 13.50 ± 2.50 2.35 ± 1.70 5.90 ± 1.09 0.67 ± 0.11

South Perth SCCIS1 0.72 ± 0.13 0.20 ± 0.11 0.10 ± 0.08 0.33 ± 0.06 0.02 ± 0.01 0 ± 0 8.71 ± 1.68 8.63 ± 4.74 3.80 ± 1.39 0.50 ± 0.06

WIFRD 1.65 ± 0.54 0.17 ± 0.15 0.39 ± 0.26 1.00 ± 0.19 0.16 ± 0.09 0.11 ± 0.04 26.84 ± 3.32 5.05 ± 15.11 5.08 ± 1.12 0.56 ± 0.11

Southern River SWS7 1.19 ± 0.33 0.04 ± 0.02 0.31 ± 0.25 0.76 ± 0.19 0.15 ± 0.05 0.09 ± 0.03 23.19 ± 6.62 3.71 ± 3.02 5.30 ± 2.21 0.79 ± 0.24

AW05 0.61 ± 0.42 0.04 ± 0.07 0.26 ± 0.29 0.23 ± 0.13 0.03 ± 0.04 0.01 ± 0.02 4.60 ± 3.14 8.00 ± 21.35 8.78 ± 1.53 0.31 ± 0.10

Susannah Brook SWN11 0.51 ± 0.19 0.04 ± 0.05 0.11 ± 0.07 0.31 ± 0.11 0.02 ± 0.02 0.01 ± 0 7.60 ± 3.05 1.30 ± 1.52 6.08 ± 2.47 0.85 ± 0.07

Upper Canning River SWS12 0.40 ± 0.21 0.03 ± 0.01 0.17 ± 0.16 0.16 ± 0.07 0.01 ± 0.01 0.01 ± 0 3.96 ± 1.16 2.05 ± 2.94 6.22 ± 1.85 0.63 ± 0.15

Upper Swan CSMDREID 1.48 ± 0.41 0.05 ± 0.04 0.62 ± 0.28 0.64 ± 0.13 0.25 ± 0.36 0.07 ± 0.04 14.54 ± 3.00 14.58 ± 22.74 6.97 ± 1.87 0.78 ± 0.18

WNDCK - - - - - - - - - -

Yule Brook SWS3 1.18 ± 0.82 0.29 ± 0.72 0.21 ± 0.19 0.52 ± 0.21 0.17 ± 0.18 0.07 ± 0.08 15.42 ± 3.91 10.09 ± 29.32 5.13 ± 1.65 0.69 ± 0.19



17 Perth rainfall This graph displays the rainfall (in millimetres) recorded in Perth from 1st January 2010 to 31st December 2015 on a monthly basis,

as shown on the Bureau of Meteorology website (rainfall data for the Perth Metro site is used).

Figure 165 Perth’s rainfall 1st January 2010 to 31

st December 2015.

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swan canning catchments data report · 2016-08-25 · swan canning catchment data report january...

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