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  • This paper is focussed on the distribution of river-dune deposits and characteristic overbank deposits, the so called Hochfluthlehm, in the central Netherlands river Rhine area. (AIS).
  • A description of the geological situation to establish which layers in the subsoil have importance for groundwater flow has been given and the hydrological properties of the observed layers were calculated. (AIS).
  • The article reviews the surveying methods applied by the Dutch geological Survey and the maps which are in preparation. Some case histories are given to illustrate the application of the results of the mapping programme. (AIS).