Instituut voor Cultuurtechniek en Waterhuishouding
Abstract
The pumping test 'De Vennebulten' which will be described in this report forms part of a large-scale groundwater exploration in the 'Achterhoek' region, province of Gelderland. In greater parts of this region, covering some 100 000 ha, groundwater is pumped from Young Pleistocene formations underlain by almost impervious layers of Tertiary clay and clay-bearing fine sands