Composite curtain wall for efficiently intercepting pollutants in farmland surface source

Abstract

The invention provides a composite curtain wall for efficiently intercepting pollutants in a farmland surface source. The composite curtain wall is characterized in that a surface plant buffer zone, a plant protection slope, a water collection zone and an anti-pollution curtain wall are arranged in sequence along the direction from a farmland drain outlet to a field drain ditch; the water collection zone is lower than the surface plant buffer zone and the anti-pollution curtain wall in height; the anti-pollution curtain wall is formed by gravel, filled soil or the combination of the gravel and the filled soil, and the shape of the cross section of the anti-pollution curtain wall is trapezoid. According to the composite curtain wall provided by the invention, the pollutants discharged by the farmland can be intercepted and purified through plant absorption and physical absorption filter, the nitrogen and phosphorus pollutants in the farmland surface source can be effectively prevented from entering water body such as a river, and the composite curtain wall has good ecological benefit and the popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of agricultural non-point source pollution control, and in particular relates to a composite curtain wall for efficiently intercepting farmland non-point source pollutants. Background technique [0002] The rice planting area in southern my country is large, the level of nitrogen fertilizer application is high, and the rainfall during the main growth period of rice is mostly in the form of torrential rain. The unemployment of nitrogen and phosphorus flow caused by unreasonable irrigation and drainage has become one of the main sources of agricultural non-point source pollution in southern China. The development of water circulation and purification systems in southern rice-growing areas, focusing on the design and development of intercepting and filtering ecological biological barriers based on the characteristics of farmland non-point source pollution sources, is an inevitable requirement for protecting the ...

AI Technical Summary

Problems solved by technology

Significant research results have been achieved in terms of the efficiency and mechanism of sewage treatment in constructed wetlands, and the functions of various components in wetland systems. However, there are still some key technical issues that need to be resolved for the wide-scale application of this technology. For example, the combination of wetlands and irrigation and drainage systems, the selection of wetland areas in the integrated management system of farmland water quantity and water quality, and the environmental effects of constructed wetlands, etc.

The filter bed system is often a multi-stage stepped filter bed, which occupies a large area, and its popularization and application are greatly restricted.

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