sydney water aquatic ecosystem monitoring. macroinvertebrate monitoring measuring the impacts of...
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Sydney Water Aquatic
Ecosystem Monitoring
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Macroinvertebrate MonitoringMeasuring the
impacts of sewage treatment plant discharges
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Active Blue Mountains STPs July 1980 (11 active)
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Active Blue Mountains STPs March 2002 (4 active)
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Wentworth Falls STP Located on the edge of the Blue Mountains World Heritage Area
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0
500
1,000
1,500
2,000
2,500
3,000
3,500
91 92 93 94 95 96 97 98 99 00
E153 DS E161 US
S TP decom m issioned
* As at 17/ 09 each year
µg
/L
Figure: Phosphorus upstream and downstream of South Katoomba sewage treatment plant
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0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
91 92 93 94 95 96 97 98 99 00
E153 DS E161 US
S TP decom m issioned
* As at 17/ 09 each year
mg
/L
Figure: Nitrogen upstream and downstream of South Katoomba sewage treatment plant
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2
3
4
5
6
7
8
Upstream Downstream Downstream com parison stream
Probable severeorganic pollution
Probable m oderate
organic pollution
Possible m ildorganic pollution
Clean water
S TPdecom m issioned
Bio
tic i
nd
ex
(S
IGN
AL
-G)
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Ecosystem Recovery Following Closure of Wentworth Falls STP
3
4
5
6
7
8
Spring1995
Autumn1996
Spring1996
Autumn1997
Spring1997
Autumn1998
Spring1998
Autumn1999
Spring1999
Autumn2000
Biot
ic in
dex
(SIG
NAL-
G in
terim
)
Upstream Downstream
Clean water
Possible mildorganic pollution
Probable moderateorganic pollution
Probable severeorganic pollution
Wentworth Falls sewage treatmentplant decommissioned
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Dragonfly Nymph
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Beetle
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Stonefly
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Midge
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Caddisfly
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Alien Species
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Catchment Development
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Impact of Urban Development Rouse Hill Area
2
3
4
5
6
7
8
Sprin
g 19
95
Autu
mn
1996
Sprin
g 19
96
Autu
mn
1997
Sprin
g 19
97
Autu
mn
1998
Sprin
g 19
98
Autu
mn
1999
Sprin
g 19
99
Autu
mn
2000
Sprin
g 20
00
Autu
mn
2001
Period
Biot
ic In
dex
(SIG
NAL-
G)
Upstream Downstream
Clean water
Possible mildorganic pollution
Probable moderateorganic pollution
Probable severeorganic pollution
Sampling of this plantwas delayed due to heavy rain - 260mm fell in October 1999.
Chlorine residualreduction commenced
August rainfall300mm plus after
relatively long dry period
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Catchment Development
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Photography Credits
The photographs used in this presentation are reproduced with kind permission of the copyright owners: Ian Wright and Sydney Water Corporation.