Geogene Grundwasserbeschaffenheit als Bemessungsgrundlage fuer den Grundwasserschutz

From the results of hydrochemical laboratory analyses and evaluations, the natural groundwater quality can be defined and the origin of major constituents can be attributed at atmogenic, pedogenic and lithogenic components. Investigations in study areas in the Quaternary plain of Northern Germany (catchment area of the Jeetzel River in northeastern Lower Saxony), at Harsewinkel in Westfalia and in the Triassic of Franconia indicate that the natural groundwater quality can be characterized by concentrations of a few major constituents, which are closely related to the lithologic conditions. The natural groundwater quality provides a reference level for the assessment of anthropogenic impacts. Specific requirements of groundwater protection for conservation of the natural groundwater quality depend on the hydrochemical composition of the groundwater. Groundwaters with very low salinity are particularly sensitive to solute inputs. Waters in carbonate rocks are generally well buffered against acid atmospheric inputs, they may, however, be influenced by inputs of nitrate or sulphate from the soil zone. (orig.)Available from TIB Hannover: RN 8908(94-127) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Umwelt, Naturschutz und Reaktorsicherheit, Bonn (Germany)DEGerman