层次分析法在太行山区地质灾害危险性分区中的应用

Application of analytic hierarchy process on zoning hazard degree of geologic disaster in Taihang Mountain region

层次分析方法是一种定性与定量相结合的多目标决策分析方法。是解决类似地质环境问题的这种目标结构复杂且又缺乏系统资料的研究问题的一条有效途径。地质灾害的发生与其所处的背景条件密切相关。当一种地质灾害具备了产生的内在条件并与适当的外在诱发条件相结合,即构成它产生的充分必要条件。否则,它具有一定的潜在危害性。论文采用层次分析法通过对河北省太行山地区地质灾害主要影响因素的分析,以滑坡、泥石流、崩塌、水土流失等为计算样本,计算出各地质灾害影响因素对计算样本的影响权重,并通过计算机进行网络剖分、因素叠加,计算出单位面积的单灾种评价指数和综合性评价指数,用以表征整个地区地质灾害的危险性。

Analytic Hierarchy Process is a multi\|goal decision\|making method with qualitative and quantitative analysis, especially efficient to resolve geological environmental problems with complicated structure and little systemic data. The happening of geological disasters keeps close to their background.The geological hazards will happen when the intrinsic conditions and inducing factors are provided, otherwise they are of potential threat.With AHP, the main affecting factors for geological hazards at Tai Hang Mountain region in Hebei province have been analyzed.Taking landslide, debrise flow, rock fall, soil erosion etc.as examples, the weight of the factors in each geological hazards have been figured out.And also, supported by computer technology in grid dissecting and factors overlaying, we have computed the single hazard evaluation index per area and the comprehensive evaluation index to express the extent of geological hazards on the whole region.