Farmland ecologic interception ditch adopting slope protection technology and construction method of ditch

Abstract

The invention discloses a farmland ecologic interception ditch adopting a slope protection technology and a construction method of the ditch. The cross section of the channel takes the shape of an inverted trapezoid, a ditch bottom is a prefabricated perforated plate, S-shaped holes are arranged in a staggered manner, and local perennial aquatic plants are planted in the holes; after being compacted, the soil bodies of ditch walls are paved with three-dimensional plant nets and covered with prefabricated perforated plates, a plurality of holes are in parallel and uniformly distributed at the middle upper parts of the perforated plates, wire grass is planted in the holes, and rye grass is replanted in the holes; a water inlet end is provided with a grating, and a water outflow end is provided with a controllable emptying gate. Through the reasonable arrangement of the plant planting holes and the anchoring action of root systems and the plant cover nets, the structural stability of the ditch is achieved. The ecologic interception ditch provided by the invention has the advantages that the structure is stable, the structural stability can approximately reach the structural strength of a concrete ditch built in facility grainfield, water erosion of farmland drainage can be resisted effectively, and meanwhile suspended matters, nitrogen, phosphorus and the like in drain water of farmland, particularly dry land, are effectively intercepted; no cultivated land is occupied, the construction cost is low, the operation is simple, and suitability for large-scale popularization and application is achieved.

Description

Technical field [0001] The invention belongs to the technical field of agricultural non-point source pollution control, and specifically relates to a farmland ecological interception ditch that integrates farmland waterlogging prevention and drainage functions and farmland runoff pollutant interception functions and adopts slope protection technology and a construction method thereof. Background technique [0002] In recent years, with the rapid development of modernization and intensification of crop production in our country, in order to pursue high yields unilaterally, excessive and unreasonable use of farmland chemical fertilizers have become increasingly prominent. The loss of nitrogen and phosphorus nutrients has caused eutrophication in important water bodies such as Taihu Lake and Dianchi Lake. It's getting worse. The Communiqué of the First National Pollution Source Survey released in 2010 showed that agricultural non-point source pollution has become the main source of ...

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Problems solved by technology

[0004] The purpose of the present invention is: according to the characteristics of non-point source pollution produced by the planting industry, aiming at the problems of poor structural stability in the process of constructing ecological ditches in the past, to provide a structure that meets the requirements of structural strength and integrates the functions of farmland waterlogging prevention and drainage and farmland runoff pollution. The farmland ecological interception ditch and its construction method using slope protection technology

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