Model hydrologiczny o parametrach przestrzennie rozłożonych, zintegrowany z Systemem Informacji Geograficznej

The aim of the article is presentation of spatially distributed water balance model WetSpass, inte-grated into Geographical Information Systems, developed in Free University of Brussels. Model simulates average spatial pattern of actual evapotranspiration, surface runoff and groundwater re-charge in raster cells. Model purposes, its structure, parameters and verification results have been described on the basis of selected publications.