加权信息量模型在云南澜沧县滑坡危险性评价中的应用  

Hazard assessment of landslides in Lancang County,Yunnan Province based on weighted information value model

作　　者：吴兴贵 王宇栋 王蓝婷 丁梓逸 WU Xinggui;WANG Yudong;WANG Lanting;DING Ziyi(Faculty of Public Safety and Emergency Management,Kunming University of Science and Technology,Kunming,Yunnan 650093,China)

机构地区：[1]昆明理工大学公共安全与应急管理学院,云南昆明650093

出　　处：《中国地质灾害与防治学报》2024年第3期119-128,共10页The Chinese Journal of Geological Hazard and Control

摘　　要：云南澜沧县位于滇西经向构造带中,在构造运动强烈,人类活动日益增加背景下,滑坡灾害发育,人民生命财产受到严重威胁,因此,对该区域进行滑坡危险性评价研究具有重要意义。以澜沧县滑坡数据为基础,选取高程、坡度、坡向、地层岩性、距断层距离、植被覆盖度、距道路距离、降雨量共8个评价因子,构建滑坡危险性评价指标体系。基于熵权法与信息量耦合模型,利用ArcGIS地理空间分析对研究区滑坡危险进行定性、定量评价并分区。结果显示:高危险区面积占17.91%,较高危险区占37.91%,中危险区占25.94%,低危险区占18.25%。经检验评价结果合理,加权信息量模型适用于滑坡危险性评价。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 

分 类 号：P642.22[天文地球—工程地质学]