基于斜坡单元的区域滑坡敏感性评价——以云南省小江流域为例  

Sensitivity Evaluation of Regional Landslide Based on Slope Units:Taking Xiaojiang River Basin in Yunnan Province as an Example

作　　者：郑玲静 李秀珍[1] 徐瑞池 ZHENG Ling-jing;LI Xiu-zhen;XU Rui-chi(Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;University of Chinese Academy of Sciences, Beijing 100049, China;Hubei Wuhan Petroleum Branch, Sinopec Sales Co., Ltd., Wuhan 430000, China)

机构地区：[1]中国科学院水利部成都山地灾害与环境研究所,成都610041 [2]中国科学院大学,北京100049 [3]中国石化销售股份有限公司湖北武汉石油分公司,武汉430000

出　　处：《科学技术与工程》2021年第28期12322-12329,共8页Science Technology and Engineering

基　　金：国家自然科学面上基金项目(41772386);国家重点研发计划(YS2018YFGH000001);中科院战略性先导科技专项(A类)(XDA20030301);国家石油华南分公司委托项目(GWHT20210014429)。

摘　　要：小江流域地形陡峻,地质条件复杂,地震及新构造活动强烈,气候水文条件复杂,致使滑坡等山地灾害十分发育。流域内滑坡不仅数量多,而且活动频繁,严重威胁着人民的生命财产安全与社会经济发展。以地表曲率分水岭法划分的斜坡单元作为基本评价单元,基于频率比法计算坡度、坡向、曲率、相对高差、岩性、断裂带密度、河网密度和地震峰值加速度8个影响因子对小江流域滑坡发育的贡献度大小,并通过ArcGIS软件叠加分析得到滑坡敏感性分区图。通过结果验证,高、极高敏感性区共发育滑坡132个,数量占比为79.04%,具有较高的准确性。相关研究成果可为小江流域的防灾减灾应急管理工作提供理论依据,对该区域的发展规划和可持续发展具有重要的现实意义。Xiaojiang River Basin is characterized by steep terrain,complex geological conditions,strong earthquake and neotectonic activities,and complex climate and hydrological conditions,which lead to the development of landslides and other mountain disasters.Landslides in the basin are not only numerous,but also frequent,which seriously threaten the safety of people's lives and property and social and economic development.The slope unit divided by the surface curvature watershed method was used as the evaluation unit.Based on the frequency ratio method,eight influencing factors including slope,aspect,curvature,relative height difference,lithology,seismic peak acceleration,fault zone density and river network density were calculated to evaluate the contribution of landslide development in Xiaojiang River Basin,and the landslide was obtained by superposition analysis based on ArcGIS software Sensitivity zoning map.Through the verification of the results,132 landslides are developed in high and extremely sensitive areas,accounting for 79.04%,with high accuracy.The relevant research results can provide a theoretical basis for the emergency management of disaster prevention and mitigation in Xiaojiang River Basin,and have important practical significance for the development planning and sustainable development of the region.

关 键 词：滑坡 斜坡单元 敏感性评价 频率比模型 小江流域 

分 类 号：X43[环境科学与工程—灾害防治]