Brussels-Capital Region: Map of the absolute piezometric phreatic levels (May 2013) obtained with the combination of the piezometric levels of the following hydrogeological units of the Brussels phreatic system:

- UH/RBC_1 Quaternary aquifer system: US/RBC_14 Silts, sands and alluvial gravels ;

- UH/RBC_2 Perched sandy aquifer system (Diest Fm, Bolderberg Fm, Sint-Huibrechts-Hern Fm and Onderdale Member);

- UH/RBC_4 Aquifer system of the Wemmel, Lede, Brussels and Vlierzele sands (or better known as the Bruxellian sands);

- UH/RBC_6 Aquitard of Tielt sands and clays ;

- UH/RBC_7 Kortrijk Sand and Clay Aquitard System (Moen Member);

This map thus includes the absolute piezometric levels of the most superficial aquifer units, in order to map the level of the "piezometric groundwater surface". The piezometric levels (in m-DNG/TAW) are represented by level lines (isopiezes) separated by a 2m step. These data are limited to the borders of the Brussels-Capital Region extended by a 500m buffer zone. These data are extracted from the Brussels Phreatic System Model v1.0 (BPSM v1.0) hydrogeological model, developed under FEFLOW 7.1 ®.

This data is generated from models and may contain errors, inaccuracies and gaps. It has informative value and may under no circumstances replace a study carried out by an expert. Bruxelles Environnement cannot be held liable for the consequences of the use of this information.