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《Journal of Hydroelectric Engineering》 2018-09
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Lake control on surface runoff causing urban flood inundation

QI Wenchao;HOU Jingming;LIU Jiahong;HAN Hao;GUO Kaihua;MA Yue;State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi'an University of Technology;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research;Sponge City Technical Center in Fengxi New Town;  
This work applies a hydrodynamic model to simulations of urban rainfall-runoff process to examine the effect of a lake in controlling urban flood inundation, focusing on peak volumes of inundation and severely inundated areas under the conditions of different rainfalls, different lake areas, and different lake locations. The results indicate that as the lake area centered at the same location is reduced from 0.502 km~2 to 0.00785 km~2, the peak inundation volume is increased by 12.7%-18.2%, and the severely inundated area increased by 11.7%-25.7%. Lake location plays an important role in determining flood inundation. This is demonstrated by the typical condition of a storm of 100 year return period and a lake area of 0.5024 km~2, in which the severely inundated areas are 0.173 km~2, 0.169 km~2 and 0.163 km~2 in the three cases of the lake located in the river's upper, middle and lower reaches respectively, indicating more effective control of a downstream lake on the surface runoff that causes urban inundation.
【Fund】: 国家自然科学基金(19672016;51739011);; 国家重大研发计划(2016YFC0402704)
【CateGory Index】: TV121;TU998.4
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