金沙江流域云南段泥石流危险度评价

Evaluation of debris flow risk of Jinsha river basin in Yunnan province

为准确评价金沙江流域云南段的泥石流危险度,以行政区划为评价单位,选取金沙江流域43个县、市作为评价目标,运用层次分析法对8个评价指标的权重进行计算。在获取各评价单元基本资料的基础上,对各单元的8项指标进行分类和定量评分,求出各县、市泥石流危险度,最后在此基础上按照一定的标准对金沙江流域43个县、市的泥石流危险度进行评价。结果表明:金沙江流域云南段的上游和下游地区是泥石流危险度较高的地区,中游地区危险度相对较低。评价结果可为流域泥石流灾害的防治、土地规划及利用等提供科学的参考。

In order to exactly evaluate debris flow risk in Jinsha fiver of Yunnan, by estimating unit of district, selecting estimative targets of 43 counties and cities in Jinsha river basin, weight of 8 evaluative indexes were calculated by AHP. Based on basic data of estimative units, 8 evaluative indexes of units were classified and quantificationally graded, debris flow risk of every district was calculated out, and that of 43 counties and cities were appraised and lower reaches in by determinate standard at last. The results show that debris flow risk are higher at upper Jinsha rever basin of Yunnan, which are lower comparatively at middle reaches. It provide scientific basis for prevention and controlling of debris flow and land use planning .