Serially-connected multi-level-rain-garden permeation system for existing residential areas

Abstract

The invention discloses a continuous multi-level rainwater garden infiltration system in an existing residential area, which includes: multiple roof gardens, multiple downpipes, multiple first-level rainwater gardens, multiple low-potential cluster central green spaces, and multiple second-level rainwater gardens. Second-level rain gardens, the elevation of the first-level rain gardens is higher than the elevation of the second-level rain gardens, and the elevation of the second-level rain gardens is higher than the elevation of the third-level rain gardens. Advantages of the present invention: the rainwater is infiltrated into the ground through infiltration facilities such as multi-stage rainwater gardens, low-level green spaces, and shallow vegetation trenches, thereby replenishing groundwater resources; the infiltration of rainwater into the ground reduces ground runoff, thereby alleviating flood disasters In the process of rainwater infiltration, the soil plays a purifying function; low-lying green spaces, shallow vegetation trenches, and rain gardens all purify rainwater runoff. These purification functions can reduce pollution problems in surface water systems.

Description

technical field [0001] The invention relates to a rainwater garden infiltration system, in particular to a rainwater pipeline discharge system in an existing residential area. Background technique [0002] At present, the drainage of rainwater in residential quarters is mainly realized by laying underground rainwater pipelines, which is the technical method of rainwater engineering planning adopted by various design institutes. Generally by the following steps: [0003] ① Estimation of rainfall [0004] The rainwater pipeline drainage technology first uses the relationship function between the rainstorm intensity q, the rainfall duration t and the return period p, that is, the rainstorm intensity formula to calculate the rainstorm intensity, and then uses the rainstorm intensity, runoff coefficient and catchment area to estimate the rainfall in the planning area . [0005] ②Arranging rainwater underground pipelines [0006] According to the predicted amount of rainwater,...

AI Technical Summary

Problems solved by technology

[0009] ①Waste of rainwater resources

In addition, the surface water system before urbanization was largely buried in the process of urbanization, resulting in the lack of surface water bodies for rainwater storage in residential areas

[0013] ③Aggravate the pollution of surface water system

These impurities make the rainwater runoff seriously polluted, and the polluted rainwater runoff is discharged to the surrounding water bodies through the stormwater outlet and the rainwater pipeline system. This process carries the garbage accumulated in the stormwater outlet, causing the deterioration of the water environment of urban rivers and lakes.

[0015] ④ Large investment in infrastructure

The invention patent only focuses on the rainwater infiltration and utilization system in the residential group green space; the invention patent does not emphasize the strategy for the characteristics of the existing residential areas in the north; the invention patent emphasizes the multi-objectives of rainwater reuse from rainwater bottles and infiltration of recessed green spaces and rain gardens Stormwater Design Strategies

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