Sponge City Program (SCP) and Urban Flood Management (UFM)—The Case of Guiyang, SW China
2021
Qi, Yunfei | Shun Chan, Faith Ka | Griffiths, James | Feng, Meili | Sang, Yanfang | O’Donnell, Emily | Hutchins, Michael | Thadani, Dimple R. | Li, Gang | Shao, Mengqi | Xie, Linjun | Liu, Sitong | Zhang, Chunguang | Li, Xinan | Liu, Lingyun | Zhong, Ming
Flood management is a complex issue in Chinese cities that exhibit high populations and have undergone rapid urbanization. Urban flood management (UFM) approaches can be used to mitigate urban flood risk. To address urban issues of poor water quality and urban surface flooding, the Sponge City Program (SCP) was initiated in 2013 in China. The SCP aims to provide an opportunity for Chinese cities to improve their current UFM practices. This study looks at Guiyang (a pilot sponge city located in SW China) as a case study to identify the challenges and opportunities of UFM in China. Guiyang is a valley city surrounded by a hilly landscape. Using interview records and flood data, we illustrate that the primary type of flood in Guiyang is fluvial rather than surface water flooding. In Guiyang, the current function and targets of the SCP have yet to engage with the catchment level flood management, instead mainly focusing on the site-specific context (i.e., community level). Catchment flood management planning (CFMP) and natural flood management (NFM) both address this problem and may be a more suitable approach to manage flood discharge from the upper and middle catchments in Guiyang. In addition, it is suggested that a mixed option combining “hard” infrastructure (e.g., reservoirs and floodwalls) with “soft” flood management measures (e.g., improving people awareness and participation) may improve urban flood resilience in Chinese cities.
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