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Case study Havel-Spree (Germany)
Peter Krahe, Anna Dorothea von Eschenbach, Enno Nilson Referat M2 „Wasserhaushalt, Vorhersagen und Prognosen“ Bundesanstalt für Gewässerkunde, Koblenz 1
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Water statistics in Germany (DESTATIS)
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Havel-Spree River Basin
Tributary to River Labe/Elbe AEo= km² Inhabitants 264 inhabitants / km²) time period for WEI+ water demand (status 2007)
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Water balance components
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WEI
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WEI+6 +7
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WEI+8 +9
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WEI
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Conclusions
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Conclusions > no single index, a combination of WEI+1 and WEI+2 or WEI+4 and WEI+3 > Option 1: communicate the range of a water stress situation in a river basin by use of 2 indices > Option 2: Study/discuss with WEI+1 index and apply an “multiplicative adjustment factor” WEI++ = Fadjustment X WEI+1 (or modified WEI+3) > use long term means instead of individual years (e.g. 10 years) > clearly separate “water stress” from “water drought” (evaluation scheme)
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Thank you for your attention
Peter Krahe Referat M2 – Wasserhaushalt, Vorhersage und Prognosen Bundesanstalt für Gewässerkunde, Koblenz Am Mainzer Tor 1, Koblenz Tel.: 0261/ Fax: 0261/ Web: 11
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