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山洪灾害调查与评价是山洪灾害防治体系非工程措施的重要组成部分。其评价内容包括沿河村落设计暴雨、设计洪水计算、防洪现状评价与预警指标分析。文中重点介绍了采用暴雨推求洪水的方法,进行山洪灾害评价计算,结合吉林市梨树川村2社计算实例,给出了梨树川村2社不同频率的暴雨、洪峰流量、现状防洪能力与预警指标值。
Investigation and evaluation of mountain torrent disasters is an important part of non-engineering measures of mountain flood disaster prevention and control system. The evaluation includes the design of rainstorms along the river villages, the calculation of design floods, the evaluation of flood prevention status and the analysis of warning indicators. In this paper, the method of inferring flood by heavy rain is introduced, and the calculation of mountain flood disaster evaluation is made. Based on the calculation example of Lishuchuan Village 2, Jilin Province, two kinds of torrential rains, flood peak flow, current flood control ability and early warning index value.