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1
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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EUROPEAN TOPIC CENTRE ONWATER
Ex 2: Inflow in 1997
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EUROPEAN TOPIC CENTRE ONWATER
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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EUROPEAN TOPIC CENTRE ONWATER
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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EUROPEAN TOPIC CENTRE ONWATER
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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EUROPEAN TOPIC CENTRE ONWATER
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
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