Novel rainwater retention infiltration system

Abstract

The invention relates to the technical field of rainwater collection and processing, and discloses a novel rainwater retention infiltration system. The novel rainwater retention infiltration system comprises a pre-processing tank and a retention infiltration tank, wherein the pre-processing tank is arranged at the outer side of the retention infiltration tank; the pre-processing tank and the retention infiltration tank are separated by virtue of a perforated partition board; gravels are kept in the pre-processing tank; the retention infiltration tank is sequentially provided with plants, a water storage layer, a coverage layer, a planting soil layer, a packing layer, an isolating layer and a gravel layer in a thickness direction; a drainage pipeline is arranged in the gravel layer of the retention infiltration tank; an overflow pipe is vertically arranged in the retention infiltration tank; one end of the overflow pipe communicates with the drainage pipeline and the other end is exposed out of the retention infiltration tank; and a reoxygenation pipe is arranged in the packing layer. With the application of the system provided by the invention, stormwater runoff pollution load can be effectively reduced, rainwater runoff volume and peak can be diminished and the problem that the system gets blocked can be effectively prevented; and the system is simple in structure, low in maintenance cost, simple and feasible in implementation and broad in application scope.

Description

technical field [0001] The invention relates to the technical field of rainwater collection and treatment, and more specifically, to a novel rainwater retention and infiltration system. Background technique [0002] In recent years, the state has vigorously advocated the construction of sponge cities to improve the quality and safety of urban water environments. Rainwater retention and infiltration system is one of the typical measures of sponge city construction, also known as bioretention system, bioretention pond, rain garden, etc. Its main structure includes plants, planting soil layer, filling layer, isolation layer, gravel layer , through the synergistic effect of plants-soil (filler)-microbes, it has huge ecological benefits in terms of total surface rainwater runoff control, flood peak reduction, purification of stormwater runoff pollutants, urban landscape and groundwater recharge, and is cost-effective. The best low-impact development technology has achieved exten...

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Problems solved by technology

[0004] These studies also mainly focus on system scale design and structure, pollutant removal effect, soil permeability, medium ratio of filling layer, hydrological effect, etc. Suspended matter and organic matter cause system blockage

The clogging of the surface soil of the system will easily lead to the decrease of the soil permeability of the system, which will affect the reduction of the total amount of rainwater runoff and the purification effect of the initial rainwater, which will virtually increase the water intake load of the urban sewage plant

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