HCOV_0500, thickness of the Bartoon quitard system

Flanders is made up of a variety of aquifers (sand, gravel, chalk, solid rock,...) and regionally occurring non-aquifers (e.g. clay). The sequence of these aquifers and aquitards has its own coding in Flanders: the Hydrogeological Coding of the Underground of Flanders (HCOV coding). The HCOV coding is made up of hydrogeological main, sub- and basic units. The main unit groups a sequence of geological layers that have the same hydrogeological properties and thus form one whole. HCOV_0500 (Bartoon Aquitard System) includes the closing layer formed by successive clay layers belonging to the Formation of Maldegem. There are some layers of sand that are hydrogeologically different from the clay layers, but they are too limited in dimension to play a major hydrogeological role. The dataset “HCOV_0500, thickness of the Bartoon Aquitard system” shows the thickness of this hydrogeological layer in a grid per grid cell.