Scattered water impoundment method for solving urban water logging

Abstract

The invention discloses a scattered water impoundment method for solving urban water logging. The scattered water impoundment method for solving urban water logging comprises the steps that an urban contour-line large-scale topographical map is drawn; urban streets are divided into a plurality of surface runoff units; urban historical rainfall data is collected; water impoundment structures in the surface runoff units are planned and designed; construction is performed; later period usage and maintenance are performed, wherein the water impoundment structures in the surface runoff units comprise sedimentation tanks and impounding reservoirs and are constructed below urban highways, water via holes are formed in the upper portions of isolation walls between the sedimentation tanks and the impounding reservoirs, shutter grates are arranged above the sedimentation tanks, the sedimentation tanks and the impounding reservoirs are provided with vent pipelines communicated with the outside, dredging grooves are formed in the bottoms of the sedimentation tanks and the bottoms of the impounding reservoirs, the bottom surfaces of the sedimentation tanks and the impounding reservoirs gradually incline towards the dredging grooves to form oblique surfaces with the gradient alpha, and the sedimentation tanks and the impounding reservoirs are provided with drain outlets, drain outlet cover plates and pedestrian ladders. The scattered water impoundment method is low in cost, strong in water impoundment capability and high in practicability, the urban water logging problem is thoroughly solved, and accumulated rainwater can be reutilized.

Description

technical field [0001] The invention relates to the technical field of municipal engineering, in particular to a decentralized water storage method for solving urban waterlogging. Background technique [0002] At this stage, there is no way to use water storage to solve the urban waterlogging problem. The general practice is to use existing urban green spaces and sidewalks to rebuild "sponge cities". The international general term is "low-impact development rainwater system construction". The stored water is "released" and used. [0003] There is a problem: [0004] First, the city is "an inch of land and an inch of gold", and it is impossible to build urban green spaces in a scattered and large area, which will cause difficulties in the construction of sponge cities; [0005] Second, the old city that has been built involves a series of problems such as demolition, which is not convenient for the overall planning and implementation of the sponge city; [0006] Third, th...

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Problems solved by technology

[0004] First, the city is "an inch of land and an inch of gold", and it is impossible to build urban green spaces in a scattered and large area, which will cause difficulties in the construction of sponge cities;

[0005] Second, the old city that has been built involves a series of problems such as demolition, which is not convenient for the overall planning and implementation of the sponge city;

[0006] Third, the area covered by the sponge city is too small compared to the overall area of ​​the city. Its principle is to use "modular" water absorption and storage, and its water absorption and storage capacity is very weak. Appears powerless during heavy rain;

[0007] Fourth, the modular water absorption and storage mechanism used in the "sponge city" is prone to fouling and difficult to clean. After one year of operation, it may become severely silted and lose its water absorption and storage function;

[0008] Fifth, the cost of "sponge city" is high, reaching 100-150 million yuan per square kilometer

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