Shoreland gradient combined type direct surface runoff pollution control system and method thereof

Abstract

The invention discloses a shoreland gradient combined type direct surface runoff pollution control system and a method thereof. The system comprises a water collection tank, a U-shaped purifying device and an overflow pipe which are sequentially connected and buried under ground surface, wherein a water outlet of the water collection tank is higher than a water inlet of the overflow pipe, the water inlet of the overflow pipe is higher than a water outlet of the overflow pipe, and the water outlet of the overflow pipe extends into a river channel and is higher than a normal water level of the river channel. Polluted direct surface runoff water flows into the water collection tank to be precipitated primarily, liquid supernatant obtained after precipitation enters the U-shaped purifying device through the water outlet of the water collection tank to be purified, the purified liquid supernatant directly enters a river or enters the river after flowing through a turf buffer zone, a hygrophyte and submerged plant system at an estuary can further purify the runoff water, and gradient control on direct surface runoff pollution is achieved. The shoreland gradient combined type direct surface runoff pollution control system disclosed by the invention has small occupancy, stable structure, good purifying effect and important significance in preventing and treating rainfall runoff pollution and protecting river channel water environment.

Description

technical field [0001] The invention relates to a technology in the field of environmental protection, in particular to a shore-shore cascade combined surface runoff pollution control system and a method thereof. Background technique [0002] Surface runoff pollution refers to the accumulation of a series of pollutants (such as crude oil, N, P, toxic substances, organic matter, etc.), and then enter the water body, polluting surface water or groundwater. Urban surface runoff is a typical non-point source pollution, which has the characteristics of wide geographical range, strong randomness, and complex causes. Non-point source pollution has become an important factor of water environment pollution. In the United States, 60% of water pollution originates from non-point sources. The control of urban runoff pollution is one of the key points of current water environment research. Realizing the effective control of urban surface runoff and exploring economical and effective ur...

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Problems solved by technology

[0005] The present invention aims at the defects of the prior art that the structure is complex, occupies a large area of ​​shore land, and at the same time, the amount of engineering is large, the overall investment is large, and the practicability is not strong. The system and its method, using the coastal land area, set up the sump and the buried U-shaped purification device, which can well intercept the suspended solids in the runoff water, effectively purify the pollutants in the surface runoff, and reduce the pollutants entering the river volume, and has a good landscape effect

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