River-adjacent road surface source reduction and rainwater recycling system

Abstract

The invention discloses a river-adjacent road surface source reduction and rainwater recycling system, which can be applied to a road bank slope with a certain river-adjacent space, and comprises four subsystems, namely an excess seepage collection subsystem, a non-point source reduction subsystem, a storage retention subsystem and a rainwater recycling subsystem. Initial rainwater runoff preferentially enters the over-infiltration collection subsystem, naturally infiltrates through an infiltration gutter inlet, an ecological tree pool and permeable pavement, and enters the non-point source reduction subsystem through an overflow port, a drainage blind pipe, a blind ditch and other paths when an infiltration space is saturated. The non-point source reduction subsystem is in an S-shaped roundabout form, the rainwater runoff path is prolonged, stagnant storage and purification are achieved, and purified rainwater flows into the storage and stagnant storage subsystem on the lower layer while pollutants such as organic matter, suspended matter, nitrogen and phosphorus are purified and removed. Gabion gabions are adopted as a basic structure frame in the storage and stagnation subsystem, a rainwater PP module is filled, a rainwater recycling lifting submersible pump, a sprinkling irrigation pipeline, a watering cart taking pipeline and an access hole are arranged, and effective recycling of rainwater resources is achieved.

Description

technical field [0001] The invention belongs to the technical field of sponge cities, and in particular relates to a non-point source reduction and rainwater reuse system for river-facing roads. Background technique [0002] The process of urbanization in my country is still in the stage of rapid development. The urbanization rate in my country has reached 60.60%, of which the developed areas such as the Yangtze River Delta have exceeded 70%. The impermeable underlying surface has increased significantly, and the hydrological process has undergone tremendous changes, which directly caused the rainfall path. With the increase in traffic flow, "waterlogging in every rain, wading in the water to see the sea" has become the new normal in large and small cities in China. At the same time, the urban non-point source pollution attached to rainfall runoff quickly converges to the river channel through the road stormwater outlet through the pipeline network, causing an instantaneous p...

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Problems solved by technology

[0004] In the prior art, Xu Ying et al. proposed a kind of sponge city sunken green space. The patent only considered the water storage capacity of the green space, but the purification effect was general; Baohan et al. proposed a green space water guide structure and disclosed a new water guide method. But neither saving nor purification is mentioned; Hu Zhiqiang et al. proposed a kind of sponge city sunken green space, which makes good use of the advantages of the slope height difference of the green space itself in rainwater reuse, but the whole system places more emphasis on the recovery of rainwater. Collection without effective reduction of non-point source pollution of organic matter, suspended solids SS, nitrogen, and phosphorus

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