The influence of the assessment of the terrain on the design solutions for water regulation on the drained lands of the Polesie zone

Summary In projects of construction and reconstruction of reclamation systems it is necessary to consider a large number of various natural factors which influence a choice of their type and a design. In drained areas, relief conditions are crucial for the choice of water regulation technologies, type, and design of drainage systems. The presence of considerable relief determines the ineffective use of precipitation due to the occurrence of surface runoff and the uneven formation of the groundwater level and the water regime on the drained lands. The relief shows the conditions of filling small rivers, and this must be taken into account in current projects of their clearing. The schematization of a relief of the drained lands in a zone of sufficient humidification and unstable humidification of Ukraine for various slopes and changes of heights of a surface of the land with the allocation of four schemes is presented. Taking into account the relief of the earth's surface in forecasting and optimization models for the selection of rational technological and design solutions for water regulation on the drained lands, it will be possible to correctly choose the type and design of drainage systems in construction and reconstruction projects.