A staged hard ecological drainage channel for farmland

Abstract

The invention discloses a staged hard ecological drainage channel for a farmland. After an original hard drainage channel is mounted, a local migration path of one part of drained water in the channelis changed by virtue of diversion, reversal flow, turbulence and the like, and retention time is prolonged. Moreover, due to filtration, adsorption, absorption and degradation effects of packing substrates, plants, microbes and the like, drainage pollutants are preliminarily intercepted and purified, drained water with small flow and high pollution degree is subjected to staged interception and purification according to a hydraulic engineering design of a standardized farmland on premise of not influencing normal hydraulic engineering requirements, the hard drainage channel is subjected to ecological reconstruction, and the content of pollutants in the drainage channel is reduced, so that the interception and purification effects of the original channel on farmland drainage are improved.Moreover, the whole staged hard ecological drainage channel for the farmland is simple in design, the original hard drainage channel is reconstructed into a linear wetland system with environmental benefits and ecological benefits, farmland drainage pollutants can be effectively treated, and impact load resistance of a regional field parcel non-point source pollution control system is improved.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a staged farmland hard ecological drainage channel. Background technique [0002] With the increase and continuation of environmental protection in our country, the pollution of industrial wastewater and urban domestic sewage has been effectively controlled, and the treatment rate of rural domestic sewage has also increased year by year. Farmland non-point source pollution has become an important source of water environment pollution today. [0003] At present, from the perspective of management and governance, China has carried out multi-faceted farmland non-point source pollution control, including fertilizer reduction and nutrient management technology for source reduction, ecological ditch interception and purification technology, wetland treatment technology such as riversides and ponds, etc. These technologies have played a major role in the process of cont...

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Problems solved by technology

These technologies have played a major role in the process of controlling farmland non-point source pollution in my country, and have always been hot technologies for research and development and attention. However, the technologies for farmland source reduction cannot be promoted on a large scale under the existing agricultural production mode in my country. Perfect policy guarantee and incentive mechanism have high management costs; although wetland treatment technology has obvious effects, it has disadvantages such as high management and maintenance costs and relatively large land occupation, which limits the practical application of technology; ecological ditch interception technology is relatively mature at present The practice of this technology is to directly intercept and purify farmland drainage pollutants through the construction of porous channels, using the functions of soil-vegetation adsorption, absorption, and microbial degradation. Auxiliary enhancement means such as sinking device construction are used to increase the impact load resistance of ecological ditches, improve and stabilize the treatment efficiency of ecological ditches

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