Composite interception system for runoff contaminants in coastal zone of rivers and lakes

Abstract

The invention discloses a composite interception system for runoff contaminants in a coastal zone of rivers and lakes. The composite interception system includes: a vegetation buffer zone, an underground water collection trench and underground cleaning pools. One side of the vegetation buffer zone is connected to a pollutant converging zone while the other side is connected to the underground water collection trench; the underground cleaning pools are arranged under the underground water collection trench at interval. The vegetation buffer zone can reduce flowing speed of surface runoff and intercept mud and sand in the runoff and absorb and eliminate related pollutants. The underground water collection trench and underground cleaning pools can merge surface flow and in-soil flow, which flow out from the vegetation buffer zone, so that the runoff contaminants are adsorbed and converted again. Through multiple layers of composite interception, adsorption, conversion, absorption and thelike from the vegetation buffer zone to the underground cleaning pools, water flowing into rivers and lakes is effectively purified by combining the technologies of a vegetation filtering zone and water centralized treatment technology and combining surface runoff interception and underground percolation purification. The system effectively reduces width of the vegetation buffer zone and saves land resources, and improves landscape effect of the coastal zone.

Description

technical field [0001] The invention belongs to the field of agricultural water and soil non-point source pollution control, and in particular relates to a compound interception system for runoff pollutants in river and lake shore zones. Background technique [0002] With the growth of population and rapid economic development, water pollution is becoming more and more serious, and non-point source pollution has become an important pollutant in water bodies. Building interception and purification systems before non-point source pollution enters rivers and lakes is crucial to reducing the nutrient load of downstream water bodies and improving the environment. Quality matters. [0003] The coastal zone is located on both sides of the river or around the lake. It is the only way for surface runoff to enter the water body of the river and lake. Building a vegetation filter belt in the coastal zone can effectively intercept and retain sediment, pollutants, pesticides, and pathoge...

AI Technical Summary

Problems solved by technology

However, due to the shortage of land resources in my country and the frequent human activities around the water body, it is difficult to change the width of the existing coastal belt to build an effective vegetation filter belt, and the investment in maintenance and supervision is relatively large.

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