Abstract
A multitude of spatial relations between the lake and its catchment prompts both water managers and scientists to use Geographic Information Systems (GIS). The paper presents the possibility of using GIS systems in the monitoring and management of Polish lakes, taking advantage of the dynamic development of geoinformatics. The focus is on the possibility of using GIS systems when creating documents necessary for the implementation of subsequent water management plans, as required by the Water Framework Directive. This review presents the currently existing spatial databases of Polish lakes and discusses the impact of the use of morphometric data of lakes on the process of water monitoring. Attention was paid to the problem of delimiting the catchment areas of lakes and the legal consequences of determining their boundaries. Tools used in the interpolation of limnological parameters and the models most often used in GIS software for water quality prediction are discussed.