Plain river-net area farmland non-point source pollution whole-process ecological control network system and construction method thereof

Abstract

A plain river-net area farmland non-point source pollution whole-process ecological control network system comprises field parcels, ecological ridges, ecological ditches, an ecological pond, a forest wet land, a river front reservoir and the like. The ecological ridges are distributed between the field parcels. Drained water enters the ecological ditches through field parcel drainage openings, finally passes through the tail ends of the ecological ditches, passes through the ecological pond and the forest wet land to enter a river and a shoreland vegetation buffer strand, is converged into the front reservoir and finally is converged into a lake or a reservoir. According to the farmland ecological control network system, by means of overall planning and layout of the face of the interior of the system and the joint action of physics, chemistry and biology, farmland non-point source pollutants hard to reduce are removed to the maximum degree, and farmland non-point source pollution control is achieved.

Description

technical field [0001] The invention belongs to the technical field of agricultural ecological engineering, and in particular relates to a full-path ecological control system for farmland non-point source pollution in a plain water network area and a construction method thereof. Background technique [0002] With the gradual and effective control of industrial pollution and urban domestic pollution, agricultural non-point source pollution, especially farmland non-point source pollution, has gradually become a major obstacle restricting the sustainable development of my country's modern agriculture and economic society. According to statistics, the average utilization rate of nitrogen fertilizer, potassium fertilizer and phosphorus fertilizer for various farmland crops in my country is only 40-50%, 30-40% and 10-20% respectively, and 40-60% of the sprayed pesticides fall to the ground. . Under the action of rainfall or irrigation, these unused and residual agricultural inputs...

AI Technical Summary

Problems solved by technology

However, most of the existing ecological technology layouts for the process control of farmland non-point source pollution only control and treat one or several processes of farmland non-point source pollution from generation to entry into rivers, lakes and reservoirs, lacking a complete set of process control technologies system

Among them, in the resource recycling of pollutants, most of the plant materials in the technical measures that have been adopted have always had the problems of small pollutant absorption and storage and short utilization cycles; moreover, the layout of these technical measures is limited to "points" Or "line", lack of "surface" overall layout within the farmland ecosystem, unable to form a network and systematization of non-point source pollution process control within the farmland ecosystem, reducing the effect of non-point source pollution control in this link

In the physical, chemical and biological joint treatment of pollutants, the selection of plant materials for ecological ponds and constructed wetlands lacks the configuration of wet-growing arbor species

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