Hydrogeological overview map of Lower Saxony 1: 500 000 — Hydrogeological spaces and sub-rooms

The map shows the hydrogeological spaces and subspaces on a scale of 1:500 000. Large hydrogeological spaces are large areas of the earth’s crust with similar hydrogeological properties and similar groundwater conditions based on the same geological origin history and a uniform tectonic type. (Definition SCHLIMM, DG NRW) Hydrogeological spaces are areas of the earth’s crust whose hydrogeological properties, hydraulic conditions and groundwater properties are uniform due to similar layer structure, similar geological structure and similar morphology within a defined range. The boundary drawing takes into account where hydrogeologically meaningful, the natural spatial structure of physical geography. (Definition SCHLIMM, DG NRW) Hydrogeological subspaces are single or more hydrogeological units that have a regionally uniform construction. The boundary drawing takes into account where hydrogeologically meaningful, the natural spatial structure of physical geography. (Definition Dörhöfer, NLfB) Hydrogeological unit is a rock body which, due to its petrography, texture or structure, has uniform hydrogeological properties within a defined range and is limited by layer boundaries, facies, erosion margins or disturbances. (Hydrogeology carting instructions 1997,Geol.Jb.G2:59). The hydrogeological units are the smallest building blocks from which the hydrogeological subspaces, rooms and large spaces are constructed in characteristic combinations. This topic is closely related to the topic "Hydrogeological Overview Map of Lower Saxony 1: 500 000 — Hydrogeological units.’ These topics are always delivered together.