Management of floodplain's water bodies ecosystems on impounded rivers

The model of management of ecosystem of floodplain water bodies of regulated rivers has been elaborated. The basic assumption is water regime in the river sections of reservoirs regulated by the releases of hydroelectric power stations (HEPS). The influence of external and internal water exchange, determined by the operating conditions of HEPS, on the dynamics of the main integral characteristics, including the content of dissolved oxygen and easily oxidized organic matter in the water, forms the basis of the model. The verification of the model was carried out under field conditions in numerous floodplain water bodies of the Dnieper River (Ukraine). The empirical equation, which describes influence of the morphological characteristics of arms connecting water bodies with the main channel on external water exchange of water bodies, is given in the paper. It can be used for the improvement of the ecological conditions of floodplain water bodies.