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冰川冻土  2014 

基于组合赋权法的白龙江流域甘肃段地质灾害危险性评价

DOI: 10.7522/j.issn.1000-0240.2014.0147, PP. 1227-1236

Keywords: 组合赋权,地质灾害危险性评价,信息量法,层次分析法,白龙江流域

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Abstract:

以甘肃省白龙江流域主要城镇环境工程地质勘查及历次地质调查数据为基础,分析了地貌、人类活动等因素对白龙江流域甘肃段地质灾害的控制作用,选定了坡度、岩性、地震、河流、降水等评价因子,采用层次分析法和信息量法组合赋权的方式确定评价因子的综合权重,最后利用GIS的叠加、以及重分类功能进行了地质灾害危险性分区评价.结果表明白龙江流域地质灾害主要分布于人口相对密集的城镇(河谷)一带,地质灾害分布相对密集,危险性较大.而以农牧业为主的中、高山区地质灾害分布相对稀疏,危险性较低.

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