摘要
选择流域面积、沟床比降、岩性系数、构造系数、冰川坡度、平均坡度、可移方量、最大淤积、冰川面积与流域面积的比值等因素作为冰川泥石流沟活动性评价的主要因素 ,应用因子分析方法确定了各因素的权重 ,并运用模糊关系理论建立了冰川泥石流活动性的评价方法。以川藏公路西藏境内 30条具有良好工作基础的冰川泥石流沟为例 ,利用此方法进行了泥石流活动性评价 ,结果表明该方法是可行的。
The study area is located in Tibet along the Sichuan Tibet highway where 30 glacier debris flow gullies are selected for study. After analyze the present data of these glacier debris flow gullies, 9 factors are chosen as main factors for evaluating the activity degree of these gullies. Factor analysis method is used to determine the weights of the factors. Using the evaluation methods of activity of rainfall debris flow gullies for reference, the fuzzy comprehensive evaluation is an effective method and it is took to this study.Correlating the evaluation result with the fuzzy degree of membership from the activity of debris flow gullies to the class of activity,it helps to explain the result.And according with the reference result, it shows that the method is available.
出处
《水土保持研究》
CSCD
2003年第2期1-4,43,共5页
Research of Soil and Water Conservation
基金
中国科学院知识创新工程项目 ( KZCX2 -3 0 6)
关键词
冰川泥石流
活动性评价
模糊综合评判
评价方法
glacier debris flow
evaluation of activity degree
fuzzy comprehensive evaluation
