1. A method for localization of oil spills in flood plain-flood complexes of small river, comprising the construction of the dam, in which the body is placed obliquely to the horizontal in the direction of a watercourse culverts, the inlets are installed at an angle to the riverbed, the recess bottom before the dam in the form of excavation vodootstoynogo characterized in that the hydraulic lock created by setting the plunger valve at the bend culvert level above the dam, and its cross section is 25-50% of the tube cross section, inlet and outlet openings rub to protect the filter at the outlet end of the water inlet mounted antierosion tray, equipped with a small trampoline and dimensions vodootstoynogo excavation is calculated considering the time of the bundle-water emulsions according to the formula: where L - length of the pit; Q- vodootstoynom water flow in the trench, Q = Q; F - vodootstoynogo excavation section, and - the width of the bottom of the excavation, m c - the width of the pit at the water's edge, m; h = H-h- depth of excavation, m.2. Protective hydraulic structure, comprising a dam with placed in her body culverts and mounted on them from the water shutoff plunger-valve vodootstoyny trench, the trench with waterproof walls before the dam for the water collection, characterized in that at the outlet end of the culvert is set antierosion tray equipped with a small springboard upper end of valve plunger is formed bent downward and located on the bend pipe above the weir level, an inlet tube fitted WMOs nym pipe with shades lattice filter, whose bottom diameter is 150-200% of the tube cross section on you
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