坡面泥石流流域地貌要素的概率分布  

Probability distribution of geomorphic factor of debris flow on mountain slope

作　　者：徐刚[1] 

机构地区：[1]西南师范大学资源环境科学学院,重庆400715

出　　处：《自然灾害学报》2005年第2期70-74,共5页Journal of Natural Disasters

基　　金：西南师范大学自然地理学博士点开放基金资助项目;重庆市软科学研究项目(1999-5482)

摘　　要：以重庆地区坡面泥石流为例,分析了正态分布、对数正态分布和伽玛分布等6种分布模式对坡面泥石流流域地貌要素概率分布拟合的适用性,选定了各地貌要素的理论分布模式。研究表明,不同的地貌要素具有不同的概率分布模式;同一地貌要素也可能有多种选择的理论概率分布,可以从中选择出最佳的分布模式。Taking debris flows on mountain slopes in Chongqing as an example, this paper analyses the adaptability of distuibution models,such as normal distribution, lognormal distribution, Gamma distribution and so on, to fit the probability distribution of geomorphic factors of debris flows drainage area. The theoretic distributions of the geomorphic factors are selected. The research shows that different geomorphic factors have different probability distributions and that several theoretic distributions may be used to appropriate for the same geomorphic factor and from them the best distribution model can be selected.

关 键 词：地貌要素 坡面泥石流 概率分布 重庆地区 

分 类 号：P642.23[天文地球—工程地质学]