The issues of forecasting damage caused by flooding of anthropogenically transformed territories in a river floodplain of a plain type are consideredbased on the case of the floodplain of the Pripyat River. A method of spatial analysis of the level of the territory usage and the depth/duration of floodingis proposed, the results of which are applicable in preparation of maps of the socio-economic risks associated with flooding, and in planning anti-floodmeasures.