长江中下游城市内涝与雨季污染协同治理对策

Coordination strategies for urban waterlogging and rainy season pollution control in middle and lower reaches of the Yangtze River

针对长江中下游城市内涝与雨季污染协同治理的突出问题,对城市水安全、雨季水体返黑返臭风险和河湖水生态退化三方面存在的问题进行了论述。发现长江中下游城市河网密度高、降水量大、暴雨多发,同时人口密集、经济发展水平高,内涝、污染、生态退化等水问题突出;城市内涝频发,雨季污染造成某些城市水体局部返黑返臭,严重影响城市水环境品质,成为制约长江中下游城市绿色发展的重要瓶颈问题。提出了建立三级内涝协同防治体系、构建城市“绿-灰-蓝”设施耦合工程体系、协同推进水体品质提升与生态修复等建议。

In response to the prominent issues of coordinated governance of urban waterlogging and rainy season pollution in the middle and lower reaches of the Yangtze River,this paper discusses three aspects including urban water safety,risk of black and odorous return of rainy season water bodies,and ecological degradation of river and lake water.It is found that the urban river network in the middle and lower reaches of the Yangtze River is characterized by high density,heavy precipitation,frequent rainstorm,dense population,high level of economic development,and prominent water problems such as waterlogging,pollution and ecological degradation.Frequent urban waterlogging and pollution during the rainy season have caused some urban water bodies to return to black and smell,seriously affecting the quality of urban water environment and becoming an important bottleneck problem that restricts the green development of cities in the middle and lower reaches of the Yangtze River.Suggestions were put forward to establish a three-level collaborative governance system for waterlogging,construct a coupling engineering system for urban“green-gray-blue”facilities,and coordinate the improvement of water quality and ecological restoration.