oa The fresh and salt water distribution in the unconfined aquifer in northern Flanders

The interface between fresh and salt water in the unconfined aquifer of Zealand Flanders (The Netherlands) and the adjacent area in Belgium has been mapped by means of a resistivity survey controlled by many well observations, The interface corresponds with an interpreted formation resistivity equal to or less than 6 Ωm. The distribution pattern of fresh and salt water is tightly linked to the geological evolution of the area. Especially the latest phase of the Dunkirk transgression and the historical inundations have had a thorough influence.