考虑历史地震烈度的楚雄州滑坡发育特征分析  

Analysis of Landslide Development Characteristics in Chuxiong Yi Autonomous Prefecture Considering Historical Earthquake Intensity

作　　者：李圣 卿元华 庄儒新[1] 罗嘉铮 段炜[1] 徐雨帆 文雯[1] LI Sheng;QING Yuanhua;ZHUANG Ruxin;LUO Jiazheng;DUAN Wei;XU Yufan;WEN Wen(Yunnan Earthquake Agency,Kunming 650224,China;School of History Geography and Tourism,Chengdu Normal University,Chengdu 611130,China)

机构地区：[1]云南省地震局,昆明650224 [2]成都师范学院史地与旅游学院,成都611130

出　　处：《华南地震》2024年第2期52-60,共9页South China Journal of Seismology

基　　金：四川省区域和国别重点研究基地东南亚经济与文化研究中心2023年度项目(DNY2304);云南省地震局青年地震科学基金项目(2022ZLK03);云南省重点研发计划(社会发展专项)(202203AC100003)联合资助。

摘　　要：楚雄州滑坡发育,影响因素复杂,处置困难。此研究以地质灾害调查数据为研究对象,选取岩层、构造、高程、坡度、坡向、历史地震烈度作为6个环境因子,采用频率比法揭示各环境因子优势区,并计算灾害易发性值,生成易发性等级图,指出楚雄州滑坡易发性高、中等级区域。基于地理探测器研究滑坡空间分布,量化各环境因子贡献度,讨论滑坡主导环境因子。最后,结合楚雄州降雨量分布探讨了滑坡诱发动力,并依据研究成果提出了针对性的防灾减灾建议。Landslides are well developed in Chuxiong Yi Autonomous Prefecture,with complex influencing factors and difficult disposal.In this study,the geological hazard survey data were taken as the research object,and the rock stratum,structure,elevation,slope,aspect,and historical earthquake intensity were selected as the six environmental factors.The frequency ratio method was used to identify the dominant areas of each environmental factor,and the hazard susceptibility values were calculated to generate hazard susceptibility grade maps,indicating the areas with high and medium landslide susceptibility in Chuxiong Yi Autonomous Prefecture.The spatial distribution of landslides was studied by using a geographic detector to quantify the contribution of each environmental factor,and the dominant environmental factor of the landslide was pointed out.Finally,the landslide-induced dynamics is discussed in the light of the rainfall distribution in the study area,and corresponding suggestions for hazard prevention and reduction are put forward based on the research results.

关 键 词：滑坡 频率比 地理探测器 易发性 

分 类 号：P315.9[天文地球—地震学]