Abstract
Urban rainstorm waterlogging is one of the most important problems in urban development and a comprehensive embodiment of urban diseases. China is facing a severe risk of rainstorm waterlogging disasters, which is affecting sustainable development. Urban rainstorm waterlogging in China is caused by many factors, including natural factors and human factors, such as climate warming, unreasonable urban construction, inadequate upgrading of urban fortification standards, etc. Based on the analysis of the current strategies to deal with urban waterlogging around the world, including an increase in surface infiltration, and a reduction in runoff (and its various impacts), this paper holds that the connotation and goal of these measures are highly consistent with the construction of a sponge city in China. Based on the analysis of the problems, including construction of an urban rainwater recovery system, construction of urban rainwater storage facilities, and construction of data platforms faced by China’s sponge city, this paper puts forward the guiding principles of promoting the construction of a sponge city. The guiding principles are to cooperate to deal with climate change and ecological civilization construction, to study the foreign experience, and to unite multiple subjects, integrate multiple elements, design multiple processes, form a joint force, and create an all-round response system to deal with urban rainstorm waterlogging. Then, this paper gives policy recommendations on how to deal with the urban rainstorm waterlogging disasters, which include improving the defense standards, encouraging social participation, popularizing the construction of sponge cities, perfecting the monitoring and early warning system, strengthening the scientific planning of cities, strengthening the ability of dealing with catastrophes in metropolitan areas, the overall planning of cross-regional responses, and enhancing the awareness of decision makers. Finally, this paper expounds the reference significance of urban rainstorm waterlogging control in China to the global audience. This paper explores the significance of comprehensively and scientifically understanding urban rainstorm waterlogging disasters, and provides support for long-term planning and high-quality construction of future safe cities.
Highlights
IntroductionDue to the effects of global warming and rapid urbanization in recent years, urban rainstorm events are becoming more frequent [1,2,3], and are occurring at the same time across the world, resulting in a high risk of urban rainstorms and flood disasters [4,5,6]
Due to the effects of global warming and rapid urbanization in recent years, urban rainstorm events are becoming more frequent [1,2,3], and are occurring at the same time across the world, resulting in a high risk of urban rainstorms and flood disasters [4,5,6].China is a high-risk, flood-prone area when it comes to the frequency of global floodcausing factors [7]
This paper mainly introduces the situation, causes, experiences, problems, and suggestions of urban rainstorm waterlogging disaster risk management in China under the background of climate change
Summary
Due to the effects of global warming and rapid urbanization in recent years, urban rainstorm events are becoming more frequent [1,2,3], and are occurring at the same time across the world, resulting in a high risk of urban rainstorms and flood disasters [4,5,6]. Man-made factors, this paper first analyzes the potential factors causing rainstorm waterlogging in China. In the process of China’s urbanization, due to the lack of foresight in urban planning, urban construction has destroyed the original natural geographical landscape pattern on a large scale, resulting in many unreasonable factors to expand urban rainstorm waterlogging [7,27]. Based on the logical analysis of the above factors, and combined with the characteristics of climate change and urban development in China, this paper analyzes the potential causes from the following eight aspects (Figure 2)
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