Water distribution device for reinforcing treatment of slope interception

Abstract

The invention belongs to the technical field of environmental protection, particularly relates to a water distribution device for reinforcing treatment of slope interception. The water distribution device for the reinforcing treatment of the slope interception is composed of an air conduit and a medium layer; basic processes of distributing non-point source runoffs of a city are as follows: when the urban non-point source runoff is smaller, polluted water flows through the medium layer, then infiltrates into a subsurface flow constructed wetland and enters a river channel through a water outlet of the subsurface flow constructed wetland; and when the urban non-point source runoff is larger, the polluted water partially infiltrates and enters the river channel through the water outlet of the subsurface flow constructed wetland, and the other part of the polluted water is subjected to surface flowing along the medium layer and directly discharges into the river channel. The subsurface flow constructed wetland is communicated with air by the set air conduit, so that the air in a constructed wetland is enabled not to be compressed for the infiltration of the polluted water, and the infiltration amount is kept. Under the premise of short land resource, the water distribution device provided by the invention can organically combine the subsurface flow constructed wetland and a riparian buffer zone together, is simple and convenient to maintain, and provides a new disposal method to solve urban non-point source pollution.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a water distribution device for enhanced treatment of slope bank interception. Background technique [0002] With the acceleration of the development of urbanization in my country, the proportion of permeable ground area is getting smaller and smaller, and urban non-point source pollution caused by storm runoff has become one of the main sources of water environmental pollution in receiving water bodies. Urban non-point source pollution is the accumulation and transfer of pollutants in sunny days, the collection and transport of runoff in rainy days, and the continuous cycle of the process of entering the receiving water body and causing pollution. Because the runoff contains a large amount of pollutants, the pollution load generated by the initial runoff At the same time, due to the high proportion of impermeable land in the city, the storm runoff ha...

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Problems solved by technology

[0003] At present, research on urban non-point source pollution control has been actively carried out at home and abroad. The widely used engineering measures include vegetation filter strips, retention/retention systems, artificial wetlands, infiltration systems, filtration systems, green roofs, and grass ditch. Engineering technology has achieved good decontamination effects in application, but there are still many shortcomings: Vegetation filter belt is a very simple and effective measure for storm runoff control, but its removal mechanism for pollutants is very complicated. Grass is the most commonly used Plants have high decontamination efficiency, but the type and density of grass and the size, shape, flexibility and structure of leaves will affect the decontamination effect of pollutants, and when the runoff is large, the decontamination of vegetation filter belt The effect becomes worse; the detention and retention system includes ponds, underground pools, culverts, water storage tanks, etc., and the construction cost of underground water storage devices is generally high, and it is relatively difficult to clean and maintain; for ponds with complex structures, runoff inlets, planting plants and Its terrain will also affect its hydrological conditions; constructed wetland technology is widely used in the treatment of storm runoff, which plays an important role in the removal of pollutants, but it must be reasonably designed according to the characteristics of storm runoff to avoid blockage of wetlands At the same time, it is necessary to adjust the water level in the dry season or rainy season to ensure the normal growth of wetland plants; the infiltration system usually includes seepage pits, seepage channels, porous pavement, etc., and the matrix materials in the seepage pits need to be replaced irregularly to avoid polluting groundwater; The volume of the seepage channel is limited, so it mainly deals with high-frequency and low-flow storm runoff and initial runoff on impervious surfaces. In urban areas with high-density buildings, the function of the seepage channel will be reduced; The removal effect is obvious, but due to the small pores of the porous pavement, clogging is prone to occur in areas with high particulate matter content, which requires better maintenance conditions; the filtration system is mostly used to treat initial runoff or small catchment areas. Heavily polluted runoff, but it is easy to block if not properly maintained, and the impact of large-flow runoff should be avoided during application to prolong its service life; the w

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