FIELD: protection of water objects from reception of biogenic substances, that are carried by return waters of irrigation systems or surface flow from dry-farming lands, purification of return waters for their following usage in irrigation. SUBSTANCE: water reservoir mouth protection installation has in series located along current antechamber, physical and chemical regulation block, block of water quality biochemical regulation. Antechamber conjugates physical and chemical regulation block with open collector. Block of water quality biochemical regulation is on one side conjugated with physical and chemical regulation block, and on the other side - with water collector by spillways-aerators and is divided by filtration-oveflow dam for two sections. Ridge and slope of dam are covered with layer of ground with growing grass. Antechamber is connected with water collector by at least two laid under bottom of biochemical regulation block branches of pipeline, outlet branch pipes of which with gates are passing through spillways-aerators. EFFECT: improved purification of return waters. 6 dwg
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