UK SuDS and Chinese Sponge Cities: solving the problems of urban flood risk management?

Woods-Ballard, B. and Kellagher, R. and Dou, V. (2017) UK SuDS and Chinese Sponge Cities: solving the problems of urban flood risk management? In: Flood & Coast 2017, 28-30 March 2017, Telford, UK. (Submitted)

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The urbanisation rate in China is higher than anywhere in the world. More than 40,000km2 of land has been developed over the last 35 years, with the number of cities increasing from 193 to 653 and urban populations rising from 170 to 750 million. The Chinese acknowledge that their cities have grown too large, too fast, without adequate planning and environmental risk management. A key outcome is that flooding has become an urgent issue: annually more than 100 cities are affected by floods, and in 2013 234 were flooded. In 2014, direct economic losses from flooding were estimated as RMB157.4 billion (£17.3 billion). Their aim to settle an additional 100 million migrant workers in cities over the next 5 years combined with likely climate change impacts on rainfall mean the stakes in China are high and the drivers for implementing solutions are imperative. Three years ago the Chinese President announced that new cities and redevelopment would conform to a ‘sponge-city’ paradigm and China’s state council announced a new set of urbanisation guidelines. This paper will describe the Chinese objectives and standards for surface water management, the progress they have made, and the policies required to facilitate the creation of Sponge Cities. It will contrast the Chinese requirements with those in the UK in the context of their potential for mitigating flood risk to urban environments, and the design tools and approaches being adopted to evaluate system performance - referencing pilot projects in which HR Wallingford have been involved.

Item Type: Conference or Workshop Item (Paper)
Subjects: Floods > General
Divisions: Floods
Depositing User: Unnamed user with email
Date Deposited: 02 Apr 2020 09:53
Last Modified: 18 May 2020 14:49

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