Hilly and mountainous area hardened ditch ecological grading interception resistance control method

Abstract

The invention belongs to the technical field of farmland non-point source control, provides a hilly and mountainous area hardened ditch ecological grading interception resistance control method, and aims to solve the problems of difficult implementation and low maintenance efficiency in the prior art. The method comprises the following steps: S1, grading interception: calculating the constructionpositions and number of desilting water tanks and retaining dams; S2, constructing a desilting water tank: selecting the intersection of an upper-stage ditch and a lower-stage ditch according to the maximum rainfall and the shape of an original drainage ditch within 24 hours of a single day in 10 years; S3, constructing a water retaining dam: arranging the water retaining dam according to the length and runoff volume of the ditch; and S4, manufacturing an ecological floating bed: specifically, the ecological floating bed comprises a bed body, a through planting groove is formed in the bed body, a clamping groove is formed in the side wall of the planting groove, a foam block for sealing the planting groove is arranged in the clamping groove, planting holes are formed in the foam block, andemergent aquatic plants are planted in the planting holes; when the width of the ditch is smaller than 1 m, a frame is arranged in the planting holes, a nylon net is arranged in the frame, and floating plants are inserted in gaps of the nylon net; the plants are all used for purifying NP pollutants in strongly enriched water.

Description

technical field [0001] The invention belongs to the technical field of farmland non-point source control, and in particular relates to a method for ecological graded interception and control of hardened ditches in hilly and mountainous areas. Background technique [0002] With the rapid development of world industrialization and the further improvement of agricultural intensification, controlling and reducing non-point source pollution has become a major problem in the field of environmental governance. As a major agricultural producing country, agricultural non-point source pollution has accounted for more than 60% of the total non-point source pollution, which leads to the deterioration of the water environment and water resources in the basin, and seriously threatens the freshwater resources that people rely on. [0003] At present, agricultural non-point source pollution has become the largest source of pollution in rivers and lakes in my country, causing serious consequ...

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