摘要
Abstract
Lancang County is located in the longitudinal tectonic zone of western Yunnan,where landslides are frequently developed by strong tectonic movement and increasing human activities,thus posing a significant threat to the safety and security of the local population.Therefore,it is of great significance to assess the landslide risk in this area.To construct a landslide risk evaluation index system,data on previous landslides in Lancang County was analyzed,and eight control factors were selected,including elevation,slope,slope direction,stratigraphic lithology,distance from fault,vegetation coverage,distance from road and rainfall.By using the entropy weight method and information coupling value model,the landslide risk in the study area was qualitatively and quantitatively evaluated,and ArcGIS geospatial analysis was used to partition the results.According to the assessment,high-risk areas accounted for 17.91％of the total area,relatively high-risk areas accounted for 37.91％,moderate-risk areas accounted for 25.94％,and low-risk areas accounted for 18.25％.The evaluation results were deemed reasonable,and the entropy weight method and information coupling value model were found to be appropriate for landslide hazard assessment in the region.关键词
滑坡/熵权法/信息量模型/危险性评价/澜沧县Key words
landslide/entropy weight method/information volume model/risk assessment/Lancang County分类
天文与地球科学
