Method for constructing agricultural drainage and ecological purification system

Abstract

The invention relates to a method for constructing an agricultural drainage and ecological purification system. The method comprises the following steps that: an elliptic ecological buffer area is formed at the tail end of an agricultural drainage channel and before an agricultural drainage culvert pipe; aquatic plants which can easily absorb N and P nutrient elements are planted in the ecological buffer area; an agricultural drainage ecological purification barrel is arranged in the agricultural drainage culvert pipe; a biological purification ring is arranged on the ecological purification barrel; water drained out of a farmland flows through the ecological buffer area by the agricultural drainage channel; certain suspended pollutants are settled and intercepted by staying for a certainperiod of time in the ecological buffer area to achieve a preliminary water purification effect and the effect of controlling the flow rate and the retention time; and larger suspended sundries are further intercepted by a wire mesh at the front end of the agricultural drainage ecological purification barrel before the water drained out of the farmland flows into the agricultural drainage ecological purification barrel to ensure that the inside of the purification barrel cannot be blocked. The method has the advantages that: the N and P nutrient elements in the water drained out of the farmland is effectively reduced by an ecological method in combination with the construction of the agricultural drainage culvert pipe, so that a receiving water body is prevented from being eutrophicated.

Description

technical field [0001] The invention relates to a method for constructing an ecological purification system for farmland drainage, and belongs to the technical fields of ecological ditch construction and agricultural non-point source pollution control. Background technique [0002] The main purpose of farmland drainage is to remove waterlogging, waterlogging, and plants that need to discard water, etc., which can create a good water and soil environment for the normal growth of crops. The dependence of production on chemical fertilizers and the long-term and excessive use of nitrogen and phosphorus fertilizers often lead to the eutrophication of farmland plow layer soil, and the eutrophication of rivers and lakes caused by the loss of farmland nitrogen and phosphorus is becoming more and more prominent. Therefore, modern farmland drainage needs to change from the traditional farmland drainage method to the ecological drainage method, and the research focus of farmland draina...

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a method for constructing an ecological purification system for farmland drainage. Its purpose is to address the problem of agricultural non-point source pollution by directly placing farmland drainage ecological purification cylinders in ditches, especially drainage culverts, to effectively control the flow of nitrogen and phosphorus in farmland. river discharge

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