For large parts of the Ruhr district detailed digital land use data of the Regionalverband Ruhr (RVR) are available as a so-called use catalogue of the land use map. This land use key can be transferred into the in SPRING required land use identification NSFN, for the recharge calculation by Schroeder and Wyrwich or NMFN for the recharge calculation by Meßer. For this the RVR key has to be provided about the element attribute KVRN.

It is emphasized that the transformation between the individual use classifications is based on experience. In individual cases this may differ. A review on plausible rates of groundwater recharge with the help of the RVR-code matching topographical map is recommended.

 

RVR-Code and land use by Schroeder and Wyrwich