【摘要】 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。更多还原

【Abstract】 The key of geohazards assessment is to determine the hazard factors and their weights,however,there is no a universally accepted method for how to determine the weight of hazard factors at present. In view of the defects of single assigning weight method and common combined weight method,this paper adopts respectively variation coefficient approach and analytic hierarchy process( AHP) to determine the objective weights and subjective weights.And on this basis,the paper proposes a new method of combination determining weight,i. e. using the ideal point theory to minimize the differences between objective / subjective weight and the ideal point,so as to obtain the weights taking comprehensively objective and subjective factors into consideration. The assessment of geohazards risk in Hefeng County of Hubei Province was taken for example in the paper. And the above- mentioned method was used to calculate the weights of factors. By comparing the result achieved by the method with those obtained by single determining weight method and common combined weight method,it is shown that the assessment method presented in this paper is more objective. This proves that the method proposed is more reliable.更多还原