随着全球气候影响和快速城市化的发展,近年来暴雨洪水频发。通过分析鄂州1959-2016年最大日降雨可知,鄂州暴雨日降雨量呈现上升趋势,变化倾向率为4.4mm/10a,58年间增加了25.5mm。通过不同重现期区域洪峰量和湖泊水量平衡计算,分析了鄂州市最大的两个湖泊——梁子湖、上鸭儿湖在不同重现期其调蓄洪水和削峰作用。梁子湖对20年一遇、50年一遇、100年一遇洪水的调蓄水量分别为3.29、3.73和4.04亿m3,调蓄水量分别占入湖水量的87%、83%和80%；上鸭儿湖对20年一遇、50年一遇、100年一遇洪水的调蓄水量分别为0.39、0.22和0.23亿m3,调蓄水量分别占入湖水量的35%、32%和30%。分析论述鄂州市湖泊在洪灾中的调蓄和削峰作用对鄂州市防洪有重大意义。

With the development of global warming and rapid urbanization,the torrential floods have been frequent in recent years． According to the maximum daily rainfall data of Ezhou in 1959 and 2016,the worst for calculating rainfall in Ezhou City by Pearson III distribution method to determine Ezhou in 20 years,50 years and 100 years of rainfall,through the analysis of Liangzi Lake in Ezhou and Yaerhu and other medium-sized lakes in different return periods of its peak and flood storage effect,found in Liangzi Lake for 20 years,50 years,100 year flood storage of water were 3．29,3．73 and 4．04 billion m3 respectively,in lake water storage capacity of 87%,83% and 80%,on Yaerhu on 20 or 50 years,the 100 year flood storage of water were 0．39,0．22 and 0．23 million m3,respectively,in lake water storage capacity of 35%,32% and 30%,compared with Ezhou City flood control and drainage standard and discuss the countermeasures of flood control in Ezhou．