HCOVv2006

Flanders is made up of an alternation 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 Subsurface of Flanders (HCOV-coding). The HCOV coding is made up of hydrogeological main, sub and base units. The main unit groups a sequence of geological layers that have broadly the same hydrogeological properties and thus form a single whole. The HCOV dataset contains grids that show the elevation value (in m TAW) of the lower boundary of the relevant hydrogeological layer per grid cell, with the exception of the grid for the pedestal where the summit is proposed. In addition to a grid file, there are occurrence limits for each main unit mapped and present in the HCOV dataset.