In order to assess water efficiency options on the European scale, a multi-criteria integrative hydro-economic modeling framework has been developed. With this framework, it is possible to assess combinations of measures which could help reducing the gap between water demand and water availability, while taking into account ecological, water quality, flood risk and economic aspects. The assessed measures include water retention, water savings and nutrient reduction measures. The presented work was carried out within the framework of the “Blueprint to safeguard Europe’s waters” policy initiative of the European Commission. Contrary to earlier studies concentrating on single measures in single river basins, this study shows that this modeling environment can evaluate combinations of measures in multiple river basins that meet the considered objectives, and in general can improve various water quantity and quality indicators as compared to the baseline situation. However, additional work is needed on for example quantifying the economics of damage and benefits before the modelling environment may be used for policy advice.
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