The project area is Thuringia. As a pilot region, Thuringia meets all criteria required for the project with regard to competing multiple uses of water infrastructure, e.g., by municipal water supply, agriculture, and nature conservation. The northeastern part of Thuringia is one of the driest regions in Germany. Especially for the area around Erfurt, there is a very low average precipitation of just under 500 mm per year.
The following map shows the mean annual precipitation in Thuringia for the time period 1989 to 2018 (colors) as well as the reservoirs in the jurisdiction of the TFW.