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地质灾害影响因子权重分配是地质灾害区划的关键,以贵州省三凯线地质灾害调查数据为实例,于公路沿线随机选取非灾害点,选择高程、坡度、河流切割密度、地层岩性4个地质灾害主要属性,形成属性决策表,根据相关知识采用不同的三角模糊隶属度函数,确定模糊粗糙集地质灾害要素权重分配模型,计算各属性与地质灾害之间的依赖度,建立模糊粗糙集地质灾害属性权重确定方法,该权重应用于因子叠加方法进行公路地质灾害区划,研究表明:用模糊粗糙集确定的地质灾害影响因子权重,相比传统专家打分所确定的权重具有较高的精度.
The weight distribution of geological hazard influence factors is the key to the geological disasters zoning. Taking the geological disasters investigation data of San Kai Line in Guizhou Province as an example, we randomly selected the non-disaster points along the highway and selected the four geology of elevation, slope, river cutting density, According to the related knowledge, different triangular fuzzy membership functions are used to determine the weight distribution model of geological hazard elements in fuzzy rough set. The dependence degree between each attribute and geological disasters is calculated and the geological hazard of fuzzy rough set is established. The weight is applied to the method of factor superposition to carry out the road geological disasters zoning. The research shows that the weights of the geological disasters influence factors determined by the fuzzy rough set have higher precision than those determined by the traditional expert scoring.