Geochemical Evolution of a Coastal Aquifer to a Holocene Seawater Intrusion (Dogger Aquifer, Northern France)

摘要

The Dogger aquifer in its unconfined part is largely used for fresh water supplies on the northern coast of France along the English Channel (Caen region). When this coastal carbonated aquifer becomes confined, groundwater presents both increasing total dissolved salts, mainly because of mixing with marine water, and a vertical stratification. Groundwater samples have been collected vertically in several boreholes and along a flow line.