基于GIS的分形理论和信息量法的区域滑坡易发性评价  

Assessment of regional landslide susceptibility based on fractal theory and information amount method of GIS

作　　者：曹洪洋 任晓莹 李志强 CAO Hongyang;REN Xiaoying;LI Zhiqiang(College of Urban Geology and Engineering,Hebei GEO University,Shijiazhuang Hebei 050031,China;Hebei Geological Engineering Exploration Institute,Baoding Hebei 071000,China;Zhongjiao Hebei Civil Engineering Co.,Ltd.Shijiazhuang Hebei 051433,China)

机构地区：[1]河北地质大学城市地质与工程学院,河北石家庄050031 [2]河北省地质工程勘查院,河北保定071000 [3]中交河北土木工程有限公司,河北石家庄051433

出　　处：《中国安全科学学报》2025年第1期178-185,共8页China Safety Science Journal

基　　金：国家自然科学基金资助(41807231);河北省自然科学基金资助(D2023403055)。

摘　　要：为减少滑坡灾害带来的损失,以湖南省常德市为例,基于野外调查和历史滑坡数据,将分形理论和信息量法应用于区域滑坡易发性评价。利用分形理论定量研究影响因子的敏感性,再进一步利用信息量法得到各二级影响因子的信息量值,通过综合分维值和信息量值得到综合信息量值,以此值对研究区进行易发性分区。结果表明:影响因子中的坡度、工程地质岩组、高程及植被等与滑坡呈二阶累计和分形分布,而其他影响因子与滑坡呈一阶累计和分形分布,通过其分维值,确定影响因子与滑坡之间的定量关系。极低、低、中、高、极高易发性区面积占比分别为5.24%、8.84%、35.06%、39.21%、11.65%,其中,年降雨量大于1600 mm、坡度20~30°和高程900~1100 m等影响因子为重要影响因子。In order to reduce the losses caused by landslide disasters,taking Changde city of Hunan province as an example,the fractal theory and information method were applied to evaluate the regional landslide susceptibility based on field investigation and historical landslide data.The sensitivity of influence factors was quantitatively studied by fractal theory.The information values of each secondary impact factor were obtained by using the information method,and the comprehensive information values were obtained by combining the fractal dimension value and the information value.Based on the values,the susceptibility zoning of the study area was carried out.The results show that the slope,engineering geological rock group,elevation and vegetation are the influencing factors that have a second-order cumulative and fractal distribution with the landslide,while other influencing factors have a first-order cumulative and fractal distribution with the landslide.The areas of very low,low,medium,high and very high susceptibility areas respectively account for 5.24%,8.84%,35.06%,39.21% and 11.65% respectively.Annual rainfall greater than 1600 mm,slope of 20-30°and elevation of 900-1100m are important factors.

关 键 词：地理信息系统(GIS) 信息量法 区域滑坡易发性评价 分形理论 地质灾害 

分 类 号：X915.5[环境科学与工程—安全科学]