基于AHP-信息量法的珠海市地质灾害风险评价

在充分分析珠海市地质灾害发育特征及分布规律的基础上，采用AHP-信息量结合的方法对珠海市地质灾害进行风险评价。首先选取7 类崩塌、滑坡评价因子和2 类地面沉降评价因子，利用ArcGIS 软件进行叠加运算形成易发性评价图，其次叠加降雨量、沉降速率形成危险性评价图，最后在危险性评价图的基础上叠加承灾体易损性形成地质灾害风险分区。结果表明，地质灾害风险评价过程中针对不同地质灾害类型采用不同评价模型和方法行之有效，且评价结果与实际相符。该成果可提高珠海市地质灾害群测群防效率。

Geological Hazard Risk Assessment of Zhuhai City Based on AHP Information Method

On the basis of fully analyzing the development characteristics and distribution laws of geological hazards in Zhuhai, the risk assessment is carried out with AHP information method. Seven types of collapse and landslide evaluation factors and two types of land subsidence evaluation factors are selected to be dealed with the ArcGIS software for superposition calculation to form the vulnerability assessment map. Then the precipitation and sedimentation rate are superimposed to form the risk assessment map, on which the vulnerability of the hazard bearing body is superimposed to form the geological hazard risk zoning. The results show that it is effective to adopt different evaluation models and methods for different types of geological hazards in the process of risk assessment, outputs of which are consistent with the actual situation. This achievement can improve the efficiency of geological hazard mass monitoring and prevention.