采用层次分析法对地质灾害进行危险性评价——以汉阴县地质灾害为例

Risk assessment of geologic hazards by analytic hierarchy process——A case study of the geologic hazard of Hanyin county

文中选取灾害点密度、坡度分布、地貌类型及高程、岩土体类型、水系分布、断裂发育程度、降雨量分布、人类工程活动强度8个评价指标因子参与汉阴县地质灾害危险性评价;根据各评价指标因子对地质灾害发育的影响程度,利用层次分析法计算各评价指标的权重,并运用MAPGIS为每个评价指标因子图层赋属性。基于MAPGIS空间分析功能完成了汉阴县地质灾害危险性区划工作;区划结果分为高、中、低3种危险性区,结合汉阴县地质灾害危险性区划成果和发展规划,为汉阴县的地质灾害防治及群测群防提供一些理论性建议。

This paper chooses density, gradient distribution, geomorphic type and altitude, rock soil mass type, river distribution, fault developmental degree, precipitation and human engineering activity intensity of geological disasters as assessment indexes for risk assessment; According to the degree of influence of each evaluation factor for the development of geological disasters, completing the geological disaster risk zoning of Hanyin county by MAPGIS using the analytic hierarchy process model; the zoning results are classified as high, medium and low risk areas. Combining the results of geological disaster risk zoning and the development planning of Hanyin county, this paper provides geological disaster prevention and control, mass prediction and disaster prevention of Hanyin county with some theoretical suggestions.