The preparation method and implementation effect of a systematic plan of a typical waterlogging area remediation project of a northern city in China were introduced. The causes of waterlogging from the scale of the catchment zone were firstly analyzed. Then, a systematic plan combining the optimization of water catchment zoning, the reconstruction of the source emission reduction system, the reconstruction of the drainage pipe and canal system, and the construction of the drainage system were formulated according to the objectives and requirements, and a drainage model was established to quantitatively evaluate the implementation effect of the plan. In the case project, the catchment area was reduced by about 24% through local drainage pipeline adjustment. The target requirements of annual total runoff control rate of no less than 70% and annual SS reduction rate of no less than 60% were achieved through the sponge transformation of residential quarters and roads, and the runoff peak value was significantly reduced. The drainage standard of pipe and channel was raised to 2 year return period through the improvement of rainwater pipe and channel. The drainage capacity and storage capacity were improved by setting channels where excessive runoff flowed into the river (greenbelt) in many places along the sidewalk, and the waterlogging prevention reached 30 year return period standard. Through the reasonable organization of runoff and the reconstruction of drainage and waterlogging prevention facilities, this systematic plan not only eliminated the urban waterlogging problem, but also achieved multiple goals such as total runoff control, runoff pollution control, landscape improvement and groundwater conservation, which could provide reference to other cities.
类似文献/References:
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