NbS在城市雨洪韧性规划中的应用研究

城市雨洪灾害的产生与气候变化、土地利用、防洪排涝基础设施空间布局等密切相关。大量研究证实,单一依靠市政改造雨水管网的传统做法工程成本高、改造难度大,实际效果不理想。而基于自然的解决方案(Nature-based Solutions,Nb S)倡导对生态系统的最小干预,将灰蓝绿基础设施有机结合,为城市雨洪韧性规划提供了一种新思路。采用“理论研究+应用案例”相结合的方法,首先分析了将Nb S理念应用到城市雨洪韧性规划中的切入点,提出Nb S视角下城市雨洪韧性规划的一些思考;其次,应用MIKE FLOOD模型,对场地雨洪风险进行评估;最后,结合应用案例特点,以堤防岸线、水系网络、水位管理为抓手,阐述了Nb S理念在城市雨洪韧性规划中的具体方案。结果表明,Nb S视角下的城市雨洪韧性规划方案具有可行性,以期共同推动Nb S实施行动。

Study on the Application of Nature-based Solutions in Planning for Urban Rain and Flood Resilience

The occurrence of urban rain and flood disasters is closely related to climate change, land use, the spatial distribution of flood control and drainage infrastructure. A large number of existing facts indicate that the traditional method of planning that relying solely on the municipal storm water pipe network has high engineering cost and great difficulty in reconstruction, whose actual effect is not ideal. The Nature-based Solutions (NbS), which advocates minimal intervention to the ecosystem and combines grey-blue-green infrastructure, provides a new planning idea for urban rain and flood resilience. This paper adopts the research method of "theory research + application case". Firstly, the way of the application of NbS to planning for urban rain and flood resilience is analyzed, with some planning thoughts for establishing urban rain and flood resilience. Secondly, the paper uses MIKE FLOOD Model to evaluate the flood risk of storm water. Finally, combining with the characteristics of the application cases, the concrete scheme that integrates NbS into planning for urban rain and flood resilience is expounded, which is mainly based on dike shoreline, water network and water level management. The results show that planning for urban rain and flood resilience can be feasible from the perspective of NbS. This paper aims to play a role in promoting the implementation of NbS in China.