2Liao RonghuaShaoyang Teacher’s College, Hunan 422000, CHINAYu Guangming Xiu Dongwen Chen Ping Wang ChaonanDepartment of Geography, Central China Normal University, Wuhan 430070, CHINA.Progress in recent study of drought,flood and waterlogging damages in China[J].Journal of Geographical Sciences,1998,8(1):52-64.