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Map 5.1 Seasonal water exploitation index in European sub-basins (2015)
Source: (EEA, 2019h)
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Exactly like in the draft report "Water and agriculture 2020", map 5.1 delivers a message that is contradictory to recent French publications. France also calculates WEI+ at river sub-basin level, and the results are surprisingly different for the summer period (we sent a map in a specific email). This issue is presently being deepened though a bilateral exchange that considers input data and other methodological choices. Before this exchange leads to a clear conclusion, it is necessary that a specific box is added, saying:
<< France processes its own calculation of the WEI+ at river sub-basin level, from 2008 onwards. Compared to EEA results, some differences are worth to be mentioned for summer, probably resulting from alternative data sources (national statistics vs modelling) and choices made for the implementation (e.g. irrigation period, ratio consumption/abstraction…). In France’s dataset, a very hight summer WEI+ appears in a south-western sub-basin (important maize production area), whereas on the contrary we observe lower values than the EEA for North-Eastern basins (Meuse, Moselle-Sarre) or in the centre of France. >>
We have addedd the following text under the map;
"Assessments of the sustainability of water abstraction at the European level remain limited by data availability and the approach to Interpretation of water returns. This may lead to large differences in the European WEI compared to national datasets. An example of this occurs in the south‑western subbasin of France along the Atlantic Coast, an important maize production area. There the national estimate of WEI is around 50% because it adopts no water returns from agriculture, whereas the European estimate, which is based on 31% returns ratio from agriculture, is below 10%."
Unfortunately this map does not show country borders. As Austrian citizen I would like to see the Austrian borders
The map aims to illsutrates the water stress condition at the hydrological basin level without considering the country boundaries. However, the country boundaries on the subbasins can be seen at the EEA indicator for use of freshwater resoruces.