Overland runoff rainwater storing and purifying integrated device with flooded culvert pipes and overland runoff rainwater storing and purifying method

Abstract

The invention relates to an overland runoff rainwater storing and purifying integrated device with flooded culvert pipes and an overland runoff rainwater storing and purifying method. The device comprises a pre-precipitating chamber (2) and a wet land unit (2), wherein overland runoff rainwater passes through a perforated partition (4) and enters the wet land unit (2) after being precipitated preliminarily; the perforated culvert pipes (3) are arranged in the wet land unit (2) side by side; the culvert pipes (3) transversely penetrate in two sides of the wet land unit (2); perforated plugs (12) are arranged at two ends of each culvert pipe (3); the wet land unit (2) comprises a gravel cushion layer (9), a sand filter layer (8) and a planting soil layer (7); and perforated drainage pipes (5) are buried in the gravel cushion layer (9). By using the device and the method, particles and soluble pollutants in the runoff rainwater can be removed, so that the pollutants in the runoff rainwater are eliminated; and the treated rainwater is stored in the device and the culvert pipes (3), wet land plants can grow by using the treated rainwater, the water seeps to surrounding soil by submerging two ends of each culvert pipe in a wet land, and the purpose of continuously cultivating and supplementing underground water is achieved.

Description

technical field [0001] The invention relates to an integrated rainwater wetland tank with submerged culverts for storage and purification and a method for treating runoff rainwater, in particular to an integrated device and method for surface runoff rainwater storage and purification with submerged culverts. Background technique [0002] Rainwater is an important part of urban water cycle and regional water cycle system, and plays a key role in regulating and replenishing groundwater resources and improving the ecological environment. With the acceleration of urbanization in our country, the impermeable area of ​​cities is increasing day by day, and the natural cycle of rainwater is threatened, which leads to the following problems. [0003] (1) Frequent occurrence of waterlogging: The construction of impermeable pavement blocks the infiltration channel of rainwater, reduces the amount of rainwater infiltration, increases the peak flow of runoff, and reduces the time of con...

AI Technical Summary

Problems solved by technology

[0003] (1) Frequent occurrence of waterlogging: The construction of impermeable pavement blocks the infiltration channel of rainwater, reduces the amount of rainwater infiltration, increases the peak flow of runoff, and reduces the time of confluence, which eventually overwhelms the drainage network, resulting in frequent occurrence of waterlogging

[0004] (2) Serious runoff pollution: The impermeable urban surface becomes the accumulation area of ​​various pollutants in human activities, and the pollutants are finally discharged into the urban water body or partially infiltrated into the ground under the erosion of rainwater runoff, causing serious pollution to the urban water body and infiltrated soil

But the present invention needs the assistance of many departments, and the cost of construction is higher

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