К ВОПРОСУ ЗАЩИТЫ ПОЙМЕННЫХ ЗЕМЕЛЬ ОТ ПАВОДКОВЫХ НАВОДНЕНИЙ

Abstract

There are considered engineering solutions on protection of flood plain – riverbed areas by means of the system of alluvial dams with a multi-level scheme of their location and a possibility of flood pass in the automated regime from the first level of the protection dam to the next. The proposed solution allows preventing from dam erosion in case of flood rising higher its crest. The authors propose a comprehensive approach to the floodplain protection from floodwater using hydro – mechanization means which includes clearing of the riverbed from bottom sediments with pump dredgers increasing its capacity and simultaneously alluvial narrow-profile dams from the bottom sediments using a device for alluvial washing,which allows alluvial narrow-profile dams with a combined profile in the form of side prisms from large fractions of soil and the middle part-from small fractions. The characteristics of the protective dam with this profile are resistant to wave impact and filtration of the dam. Calculations of technical and technological parameters carried out by the authors, as well as laboratory and field studies confirmed the possibility of using bottom sediments as a building material for construction of narrow-profile dams by the hydraulic fill method.