黄河积石峡水电站库区泥石流危险度评价

Debris Flow Hazard Assessment in Reservoir Zone of Jishi Valley Hydropower Station, Yellow River

在选取一次(可能)最大冲出物方量、泥石流发生频率、流域面积、主沟长度、流域相对高差、流域切割密度、泥沙补给段长度比7个因子为泥石流沟谷危险度划分的主要因子的基础上,对评价因子隶属度的确定作了分析和阐述,并运用模糊综合评判法对黄河上游积石峡水电站库区16条泥石流沟进行了危险度划分。

On the base of the field surveys and synthetic analyses, 7 factors including the most volume of once flow, frequency, valley dimension, valley relative height, valley incision density and the length ratio of sediment supplement are chosen as the main factors in hazard degree classification of debris flow. After confirming subordinate degree of every assessment factor, 16 creeks in the Jishi valley are classified by using the fuzzy synthetic assessment methods.