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《Geographical Research》 2018-09
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Low-impact urban development mode based on waterlogging security pattern

JIAO Sheng;HAN Jingyan;ZHOU Min;CAI Yong;HAN Zongwei;LI Bei;School of Architecture, Hunan University;School of Architecture and Urban Planning, Southwest Minzu University;Department of Tourism and Geography,Tongren University;  
The main causes of urban waterlogging are decrease of urban storage land,the spillway network fragmented by construction land,overlap of stormwater storage and construction land,and so on.This paper,based on the three levels of substrate(source of runoff),corridor(runoff pathway)and patch(confluence land),attempts to set up a low-impact urban development mode to absorb extreme storm water through its inherent storage capacity of natural hydrological system:Suyuyuan,a typical area of Changsha in southern China was taken as an example to build the low-impact development mode by spatial analysis tools Arc GIS and in hydrological analysis module in soil conservation service(SCS)based on geomorphologic and hydrometeorological data.The waterlogging security pattern was built according to the flood submergence scope and runoff path simulation of extreme rainfall According to the construction target of sponge city with annual runoff control rate of 85%,the source control water volume and corridor control water quantity were determined respectively and then the patch control water quantity was obtained.It is estimated that the area should preserve 228.2 ha stormwater storage regulation patch and 1.075 million m~3controlled water volume,and 51.5 ha waterlogging corridors and 0.101 million m~3controlled water volume after the development.This method can provide a reference for exploring the new model of sponge city construction based on extreme climate waterlogging prevention and control.
【Fund】: 国家自然科学基金项目(41471114);; 湖南省重点研发计划项目(2017SK2221)
【CateGory Index】: TU992;TV213.9
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