Rice field runoff nitrogen and phosphorus grid field control and drainage combined with farmland infiltration interception and removal system and its application method

Abstract

The invention discloses a combined interception and removal system of nitrogen and phosphorus grid field control and drainage of farmland runoff and farmland percolation, which comprises field ridges, adjustable foldable overflow weirs, percolation tanks, ceramsite percolation layers, percolation slope protection, and underground levels The infiltration body, the straw shaft and the drainage channel; the field ridge is located around the grid field, and the adjustable foldable overflow weir is set between the field ridge and the drainage channel; the percolation tank is located at the outlet of the adjustable foldable overflow weir. There is a ceramsite infiltration layer, which is connected with the polymer fiber net infiltration slope protection; the underground horizontal infiltration body is below the plow bottom layer, and is composed of corrugated plastic drainage pipes wrapped with permeable geotextiles and crop straw infiltration materials. The shaft is placed above the dark pipe and connected with it, and the shallow straw shaft is placed between the dark pipes. The invention also discloses the application method of the above system. The invention closely links farmland surface hydrological regulation and storage with underground infiltration and drainage control, realizes the comprehensive and efficient interception and removal of farmland surface and underground runoff nitrogen and phosphorus, and the removal rate of pollutants exceeds 70%.

Description

technical field [0001] The invention relates to the technical field of farmland non-point source pollution control, in particular to a combined interception and removal system for paddy field runoff nitrogen and phosphorus grid field control and drainage and farmland percolation and an application method thereof. Background technique [0002] my country's agricultural pollution situation is severe, and the water environment is seriously deteriorating. The discharge of nitrogen and phosphorus from farmland runoff is an important reason for the nutrient enrichment of surrounding rivers and lakes. Nitrogen and phosphorus pollution from farmland runoff has distinct characteristics such as potentiality, intermittentity, and large-scale and large-scale areas. Especially in the rice-growing areas in southern my country, the super-heavy rainfall and unreasonable irrigation and drainage have made the problem of farmland pollution more prominent. After long-term cultivation, paddy fi...

AI Technical Summary

Problems solved by technology

Nitrogen and phosphorus pollution from farmland runoff has distinct characteristics such as potentiality, intermittentity, and large-scale and large-scale areas.

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