Method and device for strengthening treatment of slope interception

Abstract

The invention belongs to the technical field of environmental protection and particularly relates to a method and a device for strengthening treatment of slope interception. The device consists of a sand layer, a matrix layer, a soil layer, a vegetation layer, a separating plate, an impermeable membrane and a rapid permeable matrix layer; the basic processes of non-point source pollution treatment are as follows: when the urban non-point source runoff is smaller, the polluted water flows through the sand layer and then infiltrates into the matrix layer, the whole matrix layer is divided into an upper region and a lower region through the separating plate, the sewage firstly enters the upper region and then enters the lower region through a slit at the lower part of the separating plate and finally enters a river channel through a water outlet; when the urban non-point source runoff is larger, the polluted water partially infiltrates and partially conducts surface flowing along the sand layer, a provided air conduit supplies air to the matrix layer so as to ensure the oxygen demand of the matrix layer and maintain underflow status, partially surface flowing runoff flows to the rapid permeable matrix layer, partially runoff shunt infiltrates into the matrix layer and enters the river channel through the water outlet. The invention achieves the short-range and high-efficient treatment effect under the premise of short land resources and has simple facilities, simple and convenient later maintenance and high treatment benefits.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a slope-bank interception strengthening treatment method and device. 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 has the char...

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Problems solved by technology

[0003] At present, research on the control of urban non-point source pollution has been actively carried out at home and abroad. The widely used engineering technology measures include vegetation filter belts, retention / retention systems, constructed wetlands, infiltration systems, and filtration systems. These engineering technologies are widely used in applications. Good decontamination effect has been obtained, but there are still many deficiencies: the vegetation filter belt is a very simple and effective measure for storm runoff control, but its mechanism of pollutant removal is very complicated. Grass, as the most commonly used plant, has a high However, the type and density of the grass and the size, shape, flexibility and structure of the leaves will affect the removal effect of pollutants; the retention and retention system includes ponds, underground pools, culverts, water storage tanks, etc., while underground Water storage equipment is generally expensive to build and relatively difficult to clean and maintain; for ponds with complex structures, runoff inlets, planting plants and their topography will also affect their hydrological conditions; constructed wetland technology is widely used to treat storm runoff. It 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 dry or rainy seasons to ensure the normal growth of wetland plants; infiltration systems usually include Seepage pits, seepage ditches, porous pavements, etc., the matrix materials in seepage pits need to be replaced irregularly to avoid polluting groundwater; the volume of seepage canals is limited, so it mainly deals with high-frequency and small-flow storm runoff and initial runoff on impermeable surfaces , in urban areas with high-density building complexes, the function of seepage channels will be reduced; porous pavements have obvious effects on the removal of heavy metals and toxic organic compounds, but due to the small pores of porous pavements, in areas with high particulate matter content The area is prone to clogging and needs better maintenance conditions; the filtration system is mostly used to treat the initial runoff or the heavily polluted runoff on a small catchment area, but if it is not properly maintained, it is easy to clog, and the impact of large flow runoff should be avoided during application. to prolong its service life

[0004] Although there are many types of urban non-point source pollution control technologies, they all face shortcomings such as large footprints. If combined technology methods are used, the advantages of various technologies can be fully utilized to make up for their respective shortcomings. ideal technical means

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