Multifunctional system for rainwater infiltration, collection and storage and purification of sponge city

Abstract

The invention discloses a multifunctional system for rainwater infiltration, collection and storage and purification of a sponge city.The system comprises a bioretention pond and water storage wells.Firstly, appropriate positions are selected for digging of a foundation pit of the bioretention pond and the water storage wells, and the portions, 5-10 cm away from the two sides of the bioretention pond, of the road surface are paved with opened vertical curb belts.The bioretention pond sequentially comprises a gravel covering layer, a vegetation planting soil layer, a biochar packing layer and a gravel drainage layer from top to bottom, and the periphery and bottom of the bioretention pond are both paved with anti-seepage thin film.An overflow pipe is laid on the gravel drainage layer, an upper end overflow opening is 5-10 cm higher than the gravel covering layer, and the lower end of the overflow pipe is connected with a municipal drainage pipe network.The system can be used at the places such as residential areas, schools, parking lots, parks and roads, not only can rainwater be stored, but also the content of pollutants such as nitrogen, phosphorus and heavy metal can be reduced, the purpose of recycling is achieved, city water logging is effectively relieved, and the rainwater use efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of urban rainwater storage and purification, and specifically relates to the field of a rainwater infiltration, storage and purification multifunctional system that can be used in sponge cities. technical background [0002] Sponge city refers to a city that can be like a sponge and has good "elasticity" in adapting to environmental changes and responding to natural disasters. use. In recent years, with the frequent occurrence of extreme weather, waterlogging is common in many cities in my country after heavy rainfall. Recently, the concept of "sponge city" has attracted more and more attention in solving urban waterlogging, and has been written into construction plans one after another. In the past, the methods and ideas for controlling urban waterlogging in my country were relatively simple, focusing on the pursuit of large-area hardened pavement, adding and expanding infiltration facilities and undergro...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multifunctional system that can be used for rainwater infiltration, storage and purification in sponge cities, so as to solve the problem that urban rainwater is not easy to be accumulated and secondary pollution caused during the accumulation process

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