HCOV_0220, base of the Kempen clay-sand complex

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. HCOV_0200 (Kempens Aquifer System) is formed by all Tertiary and Quaternary deposits above the Boom clay layer. Geographically, these layers mainly occur in the Kempen basin. This is the zone northeast of the day zoom of the Formation of Boom. This hydrogeological zone consists mainly of a succession of various Tertiary and Quaternary sands, alternating with whether or not important local clay layers. The dataset "HCOV_0220, basis of the clay-sand complex of the Kempen" shows in a grid per grid cell the altitude value (in m TAW) of the lower limit of this hydrogeological layer. The sub-unit "HCOV_0220 - Clay-sand complex of the Kempen" consists of alternating sand and clay layers belonging to the Quaternary Formation of the Kempen.