信息量法是滑坡灾害危险性分析方法之一,通过对区域已知滑坡体特征的分类提取,确定影响因素,按照信息量公式建立信息量模型,应用GIS技术实现整个区域的滑坡危险性分区。文章以某工程库区滑坡灾害为例,通过对滑坡灾害影响因素的选取、量化、分级及建立指标体系,将影响因素图层栅格化并建立信息量模型,从而实现滑坡灾害GIS的危险性分析,将滑坡分选出稳定区、低危险区、中危险区、高危险区4个级别的区划,为库区工程安全、环境保护和防灾减灾提供指导。 Information volume method is one of the risk analysis methods of landslide hazard. Through the classification and extraction of the known landslide body features in the region, the influencing factors are determined, and the information model is established according to the information formula, and the landslide risk partitioning in the whole area is realized by using GIS technology. Taking a case of landslide disaster in a reservoir area as an example, this paper raises the risk factors of landslide hazard by selecting, quantifying, classifying and establishing indicator system of landslide hazards, rasterizing influential factors and establishing information model According to the analysis, the landslides are sorted out into four levels of zoning in the stability zone, low-risk zone, medium-risk zone and high-risk zone to provide guidance for project safety, environmental protection and disaster prevention and reduction in the reservoir area.