Rainwater garden with rainwater filtering, purifying and storing functions and filtering method thereof

Abstract

The invention relates to a rainwater garden with rainwater filtering, purifying and storing functions and a filtering method thereof. The rainwater garden comprises a plurality of horizontal baffling areas. The horizontal baffling areas are arranged in a transverse side-by-side mode in series connection to form a multi-stage purifying area. Rainwater flows from the front end of each horizontal baffling area to the tail end of the corresponding horizontal baffling area. An overflow brick partition wall is arranged at the communicating position of the tail end of each horizontal baffling area and the front end of the other connected horizontal baffling area. Each horizontal baffling area comprises a plurality of vegetation areas and a plurality of gravel filtering areas, and the vegetation areas and the gravel filtering areas are arranged in series connection at intervals. Overflow brick partition walls are arranged between the vegetation areas and the gravel filtering areas in each horizontal baffling area. The rainwater garden has the advantages that the rainwater filtering, purifying and storing functions are given to full play, the problems about plant root rotting and rainwater reusing can be solved, and a certain landscape effect is achieved.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a rain garden with functions of filtering, purifying and storing rainwater and a filtering method thereof. Background technique [0002] With the acceleration of urbanization in our country, the impermeable area in the city has increased significantly, resulting in the runoff rainwater from rainfall carrying a large amount of pollutants, which will cause serious pollution to the water body if it is directly discharged into the water without treatment. With the concept of "sponge city" proposed, it aims to solve the problem of urban sea view in a more natural and ecological way. As a kind of biological retention facility, rain garden can filter and purify rainwater and effectively reduce the content of pollutants in water. [0003] At present, the common rain gardens have the problem of low filtration and purification efficiency. In the face of long-term rainfall...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a rain garden with the function of filtering, purifying and storing rainwater and its filtering method. Aiming at the shortcomings of the cur

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