【摘要】 本文基于拟建川藏铁路雅江县段的滑坡地质灾害野外调查及前人研究,选取高程、地形起伏度、坡度、坡向、工程地质岩组、断层、水系、降雨、植被、道路等10个因子作为滑坡易发性评价模型计算的基本变量。基于GIS的空间分析和信息量计算,获得研究区滑坡易发性信息量值,并以该值为依据采用自然断点法将研究区滑坡易发性划分为极低、低、中、高、极高易发区5个等级。对评价结果的可信度进行了检验分析,评价结果与实际灾害发生情况基本吻合。本文较好地将GIS技术和信息量相结合的评价方法运用于川藏铁路沿线复杂地区滑坡易发性评价工作中,同时其结果也可为川藏铁路建设、地区减灾防灾提供基础依据。更多还原

【Abstract】 Based on the field investigation and previous research results of the landslide disaster along the Yajiang County segment of proposed Sichuan-Tibet railway, a total of 10 factors which affect the development of geological disasters were analyzed as input variables in this article-namely, elevation, topographic relief, slope, aspect, engineering geological strata, faults, rivers, precipitation, vegetation and roads of the study area. The results of landslide susceptibility assessment based on GIS spatial analysis and information value model of Yajiang County segment of Sichuan-Tibet railway were divided into five grades: extremely high, high, moderate, low and extremely low susceptible. The results of the model basically inosculated with the field surveying. The research not only used GIS technology and information value method better, but also the results can provide a valid basis for the railway construction, landslip hazard reduction, and landslip hazard prevention in the future.更多还原