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在白龙江流域甘肃段主要城镇地质灾害详细调查的基础上,通过统计分析确定了影响区域地质灾害易发性的评价因子,利用层次分析法对各评价因子的权重进行了计算。采用地理信息系统进行空间分析,按照自然间距分类方法将地质灾害易发性结果栅格图分为高易发区、中易发区、低易发区、极低易发区4类,并绘制了区域地质灾害易发性分区图。该问题的研究对于地质灾害的防灾减灾具有一定的指导意义。
On the basis of a detailed investigation of the geological disasters of the major towns in the Bailong River basin in Gansu Province, the evaluation factors affecting the susceptibility of regional geological disasters were determined through statistical analysis, and the weights of each evaluation factor were calculated by the analytic hierarchy process. Geographic Information System (GIS) was used for spatial analysis. According to the method of natural distance classification, the grid of results of geological disaster susceptibility was divided into four categories: high-risk zone, middle-risk zone, low-risk zone and low-risk zone. Geological disaster prone to zoning map. The research on this issue has certain guiding significance for disaster prevention and mitigation of geological disasters.