Ecological ditch system for farmland return water pollution prevention and control and construction method

Abstract

The invention relates to an ecological ditch system for farmland return water pollution prevention and control. The ecological ditch system comprises farm ditches, branch ditches, a reservoir / pond and a main ditch, wherein the farm ditches, the branch ditches, the reservoir / pond and the main ditch sequentially communicate. The ecological ditch system is constructed through the following steps of (1) farm ditch construction, wherein (1-1) the farm ditches are finished, (1-2) plants are planted, and (1-3) multiple stone steps are arranged; (2) branch ditch construction, wherein (2-1) the branch ditches are finished, (2-2) branch ditch slopes are arranged, (2-3) soil intercepting dams are built, (2-4) plants are planted and artificial aquatic plants are arranged, and (2-5) gabions are arranged; (3) reservoir / pond construction; and (4) main ditch construction. According to a construction method, finishing and ecological reconstruction are carried out based on an original ditch, drainage of farmland overland runoff and farmland irrigation water is facilitated better, and the structure of agricultural production is not changed in the whole reconstruction process; and meanwhile the purification capacity of the ditch on pollutants in farmland drained water can be improved, no cultivated land resource is additionally occupied, the construction method and process and daily maintenance are simple, and implementation and popularization are easy.

Description

technical field [0001] The invention relates to the technical field of farmland non-point source pollution control, and more specifically relates to a method for constructing an ecological ditch system for preventing and controlling farmland drainage pollution, which is suitable for traditional agricultural irrigation areas with severe farmland drainage pollution, especially plain agricultural areas with vertical and horizontal ditches. Background technique [0002] At present, agricultural non-point source pollution, especially agricultural non-point source pollution caused by agricultural production and living activities, has become the most important source of water environment pollution. Agricultural non-point source pollution refers to the pollution of the water environment caused by nutrients such as nitrogen and phosphorus, pesticides, and other organic or inorganic pollutants through farmland surface runoff and farmland seepage during agricultural production activitie...

AI Technical Summary

Problems solved by technology

The invention and construction of ecological ditches can well solve the contradiction between man and land, but due to the regional differences in agricultural non-point source pollution and the different levels of regional economic development, there is no ecological ditch that is generally applicable to different agricultural farming areas.

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