Abstract
The purpose of Sponge City construction is to reduce urban water logging, reduce losses, increase the storage capacity of rainwater and flood resources, alleviate the shortage of water resources, and promote the healthy development of cities. This paper mainly studies the definition, construction idea, purpose, concrete measures and development trend of sponge city, and expounds the related problems of Sponge City in a systematic and comprehensive way.
Highlights
(4) Increase the diameter of drainage pipes and built underground water storage works in order to reduce the amount of confluence. 2.2 Measures of Storing Water Built rain pollution shunt pipe network and make use of landscape pond to solve urban rainstorm and waterlogging, so that rainstorm water through the sinking of green space and pipe network flow into the landscape pond
Culverts connected to similar ponds, so that the landscape water is in the flow of circulation state
In the non-flood season, the wetland water and the urban landscape pond water exchange and return, so that the urban water body is in a circular state, and we could alleviate the urban drainage pipe network pressure and water body self-purification effect. 2.3 Drainage Measures The ecological technology of water restoration and urban surface source pollution control are further integrated to create an ecological urban drainage system
Summary
1.3 The Purpose of Sponge City Construction Sponge City construction has the following six main purposes: (1) Comprehensive utilization of rainwater resources (2) Source dispersion control, slow down or reduce surface runoff, delay peak (3) Through green infrastructure, reduce the pressure on grey infrastructure (4) Reduce urban surface source pollution (5) Slow down or reduce urban water logging (6) Repair and rebuild urban water ecosystems. 2. Concrete Measures to Build Sponge City 2.1 Measures of Relieving Rainstorm and Flood In the construction of Sponge city, it is mainly to reduce the flood peak of drainage facilities and increase the utilization rate of rainwater by reducing the intensity of rainstorm, delaying the confluence time, increasing the cut-off space of rainstorm water and constructing the hysteresis project.
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