Description: Investigations of GIS-technologies usage possibility, in particular analytical instruments of package ArcView GIS 3.2 a, for the decision support systems designing for the anti-flood measures development are resulted. Work is executed on the example of areas of possible submergence by a river Severskiy Donets of adjoining settlements. It was built area of the river overflow, overlay areas were built for a river and settlements and estimation of these polygon objects areas crossing was executed. Settlements were ranging by the area of possible submergence that allows primary anti-flood measures foresee.
Keywords: GIS-technologies, decision support systems, anti-flood measures, analytical instruments of package ArcView GIS 3.2 a