Liu wuyi1  Shao Dongguo1  Wang Hongqian2
1.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan
University, Hubei, Wuhan 430072;2 .Water Supply Bureau,YRCC, Zhengzhou  450003  China

Abstract: To meet the demand of the Water saving eco-city planning£¬the author puts forward using  rainwater and urban lake water resource as the urban water supply, simulating and analyzing the risk index of multi-scenario with water supplying risk theory. Taking the water supplying mode optimizing of the Longzihu campus in eastern part of Zhengzhou City as a case study, the research shows that the water supplying mode should consider rainwater utilization, and the Longzihu lake should circulate with the lake of campus to reduce the cost of water supply, meet the demand of water saving and decrease the water contamination.

Key words: water supply£»risk analysis£»mode optimizing