洮河流域纳纳河山洪灾害临界雨量分析计算

摘要

Threshold rainfal is the rainfal needed to initiate mountain floodings, mud waves, and land-slides in certain rainfal durations. Based on the guidance of The Regulations of Analysis and Calculation of Mountain Floods Threshold Rainfall, several methods are introduced to analyze the initial values of the threshold rainfal . An example of calculating threshold rainfal in Nana River using these methods is provided. The methods presented in this paper have great reference value to the other basins.%临界雨量是指典型流域山洪、泥石流、滑坡等自然灾害“恰好”能够发生所对应的时段最小降雨量值。在《山洪灾害临界雨量分析计算细则》规定的基础上，经过实践摸索提出了综合分析临界雨量初值的几种方法，并以黄河支流洮河流域纳纳河为例，进行了临界雨量的分析计算。计算结果表明，所采用的分析计算方法对类似流域山洪泥石流临界雨量的分析计算具有借鉴意义。