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EUROPEAN TOPIC CENTRE ONWATER

EUROWATERNET QUANTITY (EWN-Q) 2nd Review – 2004 Update

Budapest 11-12 Nov 2004

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EUROPEAN TOPIC CENTRE ONWATER

In this presentation…

EUROWATERNET QUANTITY brief description

Number of stations in the network and status after the 2nd update (2004)

How the data have been used

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EUROPEAN TOPIC CENTRE ONWATER

EUROWATERNET QUANTITY:

Provides comparable an reliable information on quantitative aspects of freshwater resources,

It is based on existing national monitoring networks in EEA member countries, it makes no additional demands for new data gathering.

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EUROPEAN TOPIC CENTRE ONWATER

EUROWATERNET QUANTITY overcomes:

The lack of a water quantity network updated on a timely basis in Europe (see EEA Technical Report 99)

The lack of a database for high- and low-flows updated on a timely basis in Europe.

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EUROPEAN TOPIC CENTRE ONWATER

EWN-Q has been designed for:providing data on precipitation (mean and maxima) and river discharges (mean, maxima and Q95);

obtaining the areal precipitation and internal flow and sum of outflows

temporal and spatial aggregations according the EEA´s water reporting strategy, i.e. annual and national.

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EUROPEAN TOPIC CENTRE ONWATER

EWN-Q stations and determinands

Station type Variable monitored Determinands

Rain gauges (RGS) Precipitation P, Pmax (value and date)

Reference gauging stations (BGS)

Discharge

Q, Qmax (value and date) and Q95

Flux gauging stations (FGS)

Discharge

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EUROPEAN TOPIC CENTRE ONWATER

Precipitationmeasured at selected RGSs which are

representative according to the topography

representative according to the data length and quality

eligible for mean areal precipitation

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EUROPEAN TOPIC CENTRE ONWATER

RGS Statistics

RGS Statistics Country_id No of RGSs First Year Latest Year

AT 30 1971 200050

40810

4571035

ES 105 1854 2003FI 62 1988 1999FR 231GB 74 1989 2002GR 298

2230

LT 521369

MK 6 1989 1999SI 19

N/A

EE N/A

DE N/A

DK 1991 1998

N/A

N/A

N/A

HU 1971 2001

LV 1991 2002

No of selected stations for pilot study (to be updated)

No of stations provided for pilot study

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EUROPEAN TOPIC CENTRE ONWATER

River discharges at BGS

measured at non-altered catchments

representative according to the data length and quality

eligible for annual internal flow

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EUROPEAN TOPIC CENTRE ONWATER

River discharges at FGS

measured on the mouth or boundaries

representative according to the data length and quality

eligible for actual outflow

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EUROPEAN TOPIC CENTRE ONWATER

Statistics for gauging stations Country_id BGS FGS Both Fist year Last year Not definedAT 20 1961 2002DE 18 18 1990 2000 97 (1990-2002)DK 8 25 1 1989 1999EE 12 2 8 2001 2002ES 25 14 1 1914 2001FI 56 23 1989 1999FR 28 28GB 2 28 1989 2003HU 11 21 1990 2001 20 (1962-2001)LT 57 8 1993 2002LV 12 3 1 1991 2000MK 4 2 1989 1998NO 20 58 11 1960 2002SI 19 1991 2000SK 57 (2002)

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EUROPEAN TOPIC CENTRE ONWATER

Problems encountered

1) Dataset only for precipitation or discharges

2) Dataset for stations but no time-series associated

3) Time-series only for the mean value, lacking info on maxima.

4) Different datasets for different updates => which stations are the representative?

5) Minor common problems, such as errors in coordinates, change of names/ids, data units (mm instead of m3/s).

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EUROPEAN TOPIC CENTRE ONWATER

Use of data

1) Spatial aggregation for areal precipitation

2) Spatial aggregation for areal inflow

3) Sum of outflows

4) Floods (P and Q maxima)

5) Low-flows (Q95, P-percentiles)

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EUROPEAN TOPIC CENTRE ONWATER

Process for annual aggregation

1) Stations used for spatial aggregation checked

2) Time-series for these stations checked

3) For each year, do values exist for all stations? Otherwise, apply rules for data filling

4) Interpolation

5) Statistics derived from this process: accept/reject the value obtained.

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EUROPEAN TOPIC CENTRE ONWATER

Ex 1: Mean precipitation in 1997

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Ex 2: Inflow in 1997

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Country_id P calc (mm) Runoff calc(mm)AT 1049FI 521 309DE 194HU 533 56LV 756 240MK 652 196NO 1515ES 883 329GB 960 704

Results for 1997

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EUROPEAN TOPIC CENTRE ONWATER

0

2

4

6

8

10

12

14

16H

U00

0043

_199

0

HU

0000

43_1

996

HU

0000

43_2

001

HU

0000

46_1

995

HU

0000

46_2

000

HU

0003

51_1

993

HU

0003

51_1

998

HU

0003

52_1

991

HU

0003

52_1

996

HU

0003

52_2

001

HU

0003

53_1

994

HU

0003

53_1

999

HU

0003

54_1

992

HU

0003

54_1

997

HU

0005

62_1

990

HU

0005

62_1

995

HU

0005

62_2

000

HU

0010

59_1

993

HU

0010

59_1

998

HU

0020

49_1

991

HU

0020

49_1

996

HU

0030

60_1

996

HU

0038

69_1

990

HU

0038

69_1

996

Q (

m3/

s)

Timeseries Ex: Q in HU

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EUROPEAN TOPIC CENTRE ONWATER

0

200

400

600

800

1000

1200

P_D

AG

DA

_199

1

P_D

AG

DA

_199

8

P_D

UN

DA

G_1

996

P_D

ZE

RB

_199

3

P_L

ITE

NE

_199

2

P_L

ITE

NE

_199

9

P_O

LER

I_19

96

P_S

ILI_

1993

P_S

ILI_

2000

P_V

EN

DZ

A_1

998

P_Z

AK

I_19

95

RID

M99

MS

_199

2

RID

M99

MS

_199

9

RIJ

E99

PA

_199

6

RIR

E99

MS

_199

3

RIR

E99

MS

_200

0

RIS

A99

PA

_199

7

RIS

I99P

A_1

994

P(m

m)

Timeseries Ex: P in LV

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Data for flood indicators

Pmax

Countries with data: FI, LV, AT, HU, ES. The time-series length is as for P.

Data allow the ratio Pmax/P (value and date) and frequency distribution for maxima

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EUROPEAN TOPIC CENTRE ONWATER

0

2

4

6

8

10

12

14

AT

1002

14_1

971

AT

1006

51_1

971

AT

1012

20_1

971

AT

1017

90_1

971

AT

1024

83_1

971

AT

1026

32_1

971

AT

1034

40_1

971

AT

1038

79_1

971

AT

1039

78_1

971

AT

1043

72_1

971

AT

1045

13_1

971

AT

1056

35_1

971

AT

1059

08_1

971

AT

1059

99_1

971

AT

1062

52_1

971

AT

1063

69_1

971

AT

1068

56_1

971

AT

1070

29_1

971

AT

1077

06_1

971

AT

1092

56_1

971

AT

1095

61_1

971

AT

1099

75_1

971

AT

1105

69_1

971

AT

1110

05_1

971

AT

1117

16_1

971

AT

1123

67_1

971

AT

1130

43_1

971

AT

1131

26_1

971

AT

1133

24_1

971

AT

1142

80_1

971

0

2

4

6

8

10

12

14

16

FI1

003_

1989

FI1

01_1

999

FI1

1_19

98

FI1

302_

1997

FI1

401_

1996

FI1

506_

1995

FI1

801_

1994

FI2

101_

1994

FI2

303_

1993

FI2

604_

1992

FI2

806_

1991

FI3

013_

1990

FI3

101_

1989

FI3

201_

1999

FI3

303_

1998

FI3

409_

1997

FI3

802_

1996

FI4

206_

1990

FI4

407_

1989

FI4

602_

1999

FI4

802_

1993

FI5

301_

1992

FI5

502_

1991

FI6

303_

1991

FI6

705_

1990

FI7

304_

1995

FI7

501_

1994

FI7

703_

1993

FI8

602_

1992

FI9

403_

1989

FI9

605_

1992

Most frequent month=7

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Data for flood indicators

Qmax

Countries with data: FI, LV, AT, HU, ES. The time-series length is as for P.

Data allow the ratio Pmax/P (value and date) and frequency distribution for maxima

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River Rhine at DE603080

0

1

2

3

4

5

1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002

Qm

ax/Q

River Segura at ES07030

020406080

100120140160

Qm

ax/Q