以联合国公布的易损性定义为基础 ,论述了影响区域易损性的代表性因子及其量化方法 ,探讨了各因子与易损性的相互关系 ,论证了区域泥石流易损性评价的建模过程及其数学表达。区域泥石流易损性反映泥石流作用下垫面的社会、经济和环境属性 ,与固定资产投资、国内生产总值和土地资源价值以及人口密度和人口质量 (年龄大小、教育水平、富裕程度 )有关。区域泥石流易损性定量表达为财产指标赋值和人口指标赋值平均值的平方根。以四川凉山州为研究实例 ,对此评价方法进行了应用。

Based on the definition of vulnerability published by the Department of Humanitarian Affairs , United Nations, the present paper discusses the representative factors influencing regional vulnerability of debris flows and the factor quantification as well as the relationships between the factors and the vulnerability. Also this paper discusses the quantitative model of regional vulnerability assessment of debris flows. Regional vulnerability reflects the socioeconomic and environmental characteristics of the base surfaces impacted by debris flows, which relates to fixed assets , gross domestic products, land resources , population density and population quality (age, education, wealthy) . Regional vulnerability of debris flows mathematically expressed as a square root of the average of the transformed values of property and population. This methodology has been applied to Liangshan State of Sichuan Province and a good agreement has been achieved.