Beach and trough diversion regulation and control method for water environment treatment

The invention discloses a beach and trough diversion regulation and control method for water environment treatment, and the method comprises the following steps: building an inlet hydraulic dam crossing a river channel at the upstream inlet position of a beach land, and regulating and controlling the diversion of the beach land through the inlet hydraulic dam, wherein the specific diversion realization method comprises the following steps: acquiring the water depth of a main river channel at the upstream of a bottomland inlet, the width of the inlet, the designed water-passing section area and the grain rate, the hydraulic radius and the hydraulic gradient of the bottomland; according to the width of the bottomland inlet, calculating the bottomland inlet flow through a wide-crest weir flow formula; calculating the designed overflowing flow of the beach land according to the grain rate, the hydraulic radius and the hydraulic gradient of the beach land, and adjusting beach and trough diversion according to the