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基于新组合赋权法的地质灾害危险性评价

DOI: 10.13577/j.jnd.2015.0304, PP. 28-36

Keywords: 地质灾害,危险性评价,主观赋权法,客观赋权法,组合赋权法,理想点

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Abstract:

地质灾害危险性评价的关键在于确定致灾因子及其权重,而目前对于如何确定致灾因子权重值尚无一种公认的方法。针对单一赋权方法的缺陷和一般组合赋权法的不足,采用层次分析法和变异系数法分别确定致灾因子的主观权重值和客观权重值。并在此基础上,应用一种新的组合赋权的方法,即利用理想点理论使主观权重和客观权重与理想点间的差异最小,从而得到综合考虑了主、客观因素的因子权重值。以湖北省鹤峰县地质灾害危险性评价为例,并依据上述方法得到了致灾因子的权重危险性评价结果。将计算得到的危险性评价结果与单一赋权方法和一般组合赋权得到的评价结果进行对比,验证了所提方法的可靠性。

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