Slope ecological gully system for efficiently intercepting and absorbing runoff nitrogen and phosphorus

Abstract

The slope ecological ditch system comprises a main drainage ditch and an absorption area, a water inlet is formed in the high position of the absorption area, a water outlet is formed in the low position of the absorption area, and the ditch bottom of the section, connected with the front end of the water inlet, of the main drainage ditch gradually sinks to the bottom of the water inlet to form a settlement face. The rear wall of the water inlet vertically extends upwards to the bottom surface of the main drainage ditch to form a water retaining surface, the water outlet is provided with a filtering device for intercepting runoff particle pollutants and garbage, aquatic plants for absorbing runoff nitrogen and phosphorus are planted in the absorption area, and a pebble bed for fixing roots and adsorbing suspended particles is laid at the bottom of the absorption area. The absorption capacity of runoff nitrogen and phosphorus can be kept by regularly replacing aquatic plants, medium and light rain runoff or rainstorm front-section runoff can be effectively intercepted, nitrogen and phosphorus pollutants are intercepted and absorbed, non-point source pollution is avoided, and the method has the advantages of preventing water and soil loss, being good in flood discharge effect and remarkable in nitrogen and phosphorus interception and absorption effect, beautifying the environment and protecting farmland biological diversification.

Description

technical field [0001] The invention relates to the technical field of prevention and control of agricultural non-point source pollution, in particular to a slope ecological ditch system for efficiently intercepting and absorbing runoff nitrogen and phosphorus. Background technique [0002] Common ditches are divided into soil ditches and hardened ditches. When ditches are built, green plants are usually planted to beautify the environment, prevent soil erosion, and prevent nitrogen and phosphorus loss. About 30% of the front runoff will carry away about 80% loss of nitrogen and phosphorus. [0003] Since the main function of the ditch on the dry slope is to discharge floods, planting plants will reduce the water area of ​​the ditch, thereby affecting flood drainage. The strong water force during flood discharge will wash away the aquatic plants in the ditch and block the downstream ditch; The non-rainy season is in a dry state for a long time, and the aquatic vegetation pl...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a sloping ecological ditch system that efficiently intercepts and absorbs runoff nitrogen and phosphorus. It has good flood discharge effect, ecological beautification, and remarkable effect of intercepting and absorbing runoff nitrogen and phosphorus. A series of problems such as flood discharge, missing plants unable to absorb the non-point source pollution caused by runoff nitrogen and phosphorus

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