Аннотация:A system of natural (geologic-geomorphological, biotic, meteorological and complex landscape) and anthropogenic factors causing catastrophic flooding in the upper course of the Prut within the landscape of Chornogora has been analysed. A dynamic correlation in time between atmospheric precipitations and a change of water level in the course of the river has been traced. A range of unigue, incomparable ecologic-geographic consequences of flooding, connected with the bottom erosion, the change of course profile, the side erosion, activisation of slides processes, the change of landscape structure of the territory and economic Losses has been determined. Key words: flood, physical-geographic factors, dynamics, natural territorial complex.