Hydrogeological Map of Switzerland: Vulnerability of Groundwater Resources 1:500000

The Federal Office for the Environment (FOEN) is the body within the Swiss Geological Survey responsible for hydrogeology. The 1:500,000 Hydrogeological Map forms part of the GeoMaps series (GK500) and is divided into two sheets. The first (GK500-Hydro) represents the various groundwater resources in Switzerland and their productivity. The second (GK500-Hydro_Vul) shows the vulnerability of the groundwater resources to the risk of pollution. The principle of vulnerability is an important element of preventive groundwater protection. The two sheets were originally published as Tables 8.6 and 8.7 of the Hydrological Atlas of Switzerland HADES (FOEN, 2004 and 2007).