基于信息量法的云南省景东县红层滑坡易发性评价  

Evaluation of red bed landslide vulnerability in Jingdong County,Yunnan Province based on information method

作　　者：卢辉雄[1,2,3] 王诜 黄燕鹏 孙永彬 程旭[1,2,3] 王少帅 牛海威 李启亮[1,3] LU Huixiong;WANG Shen;HUANG Yanpeng;SUN Yongbin;CHENG Xu;WANG Shaoshuai;NIU Haiwei;LI Qiliang(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,Hebei,China;Key Laboratory of Airborne Survey and Remote Sensing,Shijiazhuang 050002,Hebei,China;High-resolution Earth observation system data applica-tion technical support center of Hebei Province,Shijiazhuang 050002,Hebei,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]河北省航空探测与遥感技术重点实验室,河北石家庄050002 [3]高分辨率对地观测系统河北数据应用技术支持中心,河北石家庄050002

出　　处：《矿产勘查》2024年第S2期698-708,共11页Mineral Exploration

基　　金：2021年度云南省重点区域地质灾害精细化调查与风险评价项目(YNGH[2021]-055)资助。

摘　　要：云南省景东县大部分处于滇西红层区,是典型的“易滑地层区”,区内红层具有岩体易软化、软弱层带和泥化夹层普遍发育等特点,在强降雨过程中易产生群发性滑坡灾害,进而造成巨大的生命财产损失。本文以景东县红层滑坡为研究对象,采用信息量法,选取与红层滑坡关系密切的高程、坡度、断层距离、工程地质岩组、水系距离、人类工程活动密度共6个评价因子开展易发性评价研究,得到区域性滑坡灾害易发性信息量值,利用自然断点法结合人工划分,将易发性分区划为高、中、低3个等级。通过评价分析,将研究区分为3片大区、11片亚区:(1)高易发区4片,面积2206.90 km^(2),占县域总面积的49.52%,呈北西向条带状分布于澜沧江左岸、无量山东坡、哀牢山西坡;(2)中易发区4片,面积973.90 km^(2),占县域总面积的21.85%,分布于县域西南部、北东部;(3)低易发区3片,面积1276.07 km^(2),占县域总面积的28.63%,分布于无量山、哀牢山腹地。本文研究结果能够较好地反映研究区红层滑坡的分布规律,可为景东县防灾减灾工作提供科学依据。Most of Jingdong County of Yunnan Province is located in the red bed area of western Yunnan Province,which is a typical"slippery stratum area".The red bed in this area has the characteristics of easy rock softening,soft bed zone and mud interlayer development,etc.,which is easy to produce mass landslide disasters in the course of heavy rainfall,and then cause huge loss of life and property.In this paper,the red layer landslide in Jingdong County is taken as the research object,and six evaluation factors,including elevation,slope,fault distance,engineering geological rock group,water system distance and human engineering activity density,which are closely related to the red layer landslide,are selected by the information method to carry out the evaluation and study on the red layer landslide susceptibility.The regional landslide disaster susceptibility information is obtained,and the natural breakpoint method is combined with artificial division.The susceptibility zones were divided into three levels:high,medium and low.Through evaluation and analysis,the study was divided into 3 large areas and 11 sub-areas:(1)4 high-prone areas,with an area of 2206.90 km^(2),accounting for 49.52%of the total county area,distributed in a NW linear direction on the left bank of Lancang River,the east slope of Wuliang Mountain and the west slope of Ailao Mountain;(2)There are 4 middle-prone areas with an area of 973.90 km^(2),accounting for 21.85%of the total area of the county,distributed in the southwest and northeast of the county;(3)There are 3 low-prone areas with an area of 1,276.07 km^(2),accounting for 28.63%of the total county area,distributed in the hinterland of Wuliang Mountain and Ailao Mountain.The results of this study can well reflect the distribution law of red-bed landslide in the study area,and can provide a basis for disaster prevention and mitiga⁃tion work in Jingdong County.

关 键 词：云南省景东县 红层滑坡 信息量法 评价因子 易发性评价 

分 类 号：P642[天文地球—工程地质学]