FIELD: hydraulic engineering. SUBSTANCE: dam includes upstream and downstream fills, culvert inclined towards lower pool, hack of impervious device in form of screen with crest. Upper part of impervious device on the side of lower pool is made in form of trench of broken V-shaped profile with upper and lower walls. When water level in water reservoir exceeds definite value, hydrostatic pressure force acts on downstream fill to make it creep and activate emergency spillway. EFFECT: higher efficiency. 5 cl, 3 dwg
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