2014年8月3日云南鲁甸MS6.5地震触发滑坡遥感解译研究

doi:10.12196/j.issn.1000-3274.2023.04.007

摘要/Abstract

摘要： 不同地貌环境下的同震触发滑坡类型会有巨大差异，确认同震滑坡类型对认识致灾特征有重要意义。本文以2014年8月3日云南鲁甸M_S6.5地震触发滑坡为例，利用多时相高分辨率卫星、航空遥感数据，结合遥感解译及野外调查方法，分析这次中强地震触发滑坡的主体类型。研究结果表明， ① 本次地震触发滑坡数量6 209处，总解译面积9.72 km²，其中10处面积大于70 000 m²的滑坡造成震中区主要的堰塞湖堵江、生命线中断等严重灾情； ② 同震滑坡主体为基岩崩塌，物源区较小、流通区狭长，堆积区沿坡脚倒石堆，具有同震滑坡解译面积大而体积小的特征； ③ 本次鲁甸M_S6.5地震触发滑坡是中国西部高山峡谷地貌背景下的以基岩崩塌为主的特征。以上认识对该地区地震滑坡的定量研究有一定借鉴意义。

关键词: 2014年鲁甸M_S6.5地震, 地震滑坡, 牛栏江, 遥感解译, 解剖地震

Abstract: The types of coseismic landslides in different geomorphological environments have great differences. Confirming their types is of great significance for understanding the characteristics of disasters. Using multitemporal highspatial resolution satellite and aerial images, combined with comprehensive remote sensing interpretation and field investigation methods, retrospectively study the temporal and spatial distribution characteristics of landslides triggered by the typical moderate to strong earthquake in western China, and have a good understanding of the occurrence and evolution characteristics of coseismic secondary disasters. This paper focused on the case of “moderate size earthquake with severe catastrophe” of the August 3^rd, 2014 Ludian M_S6.5 earthquake in Yunnan Province which triggering coseismic landslides. The research shows that ① The number of triggeredlandslides database is 6 209, with a total area of 9.72 km², of which 10 landslides have areas of great than 70 000 m² caused major disasters, such as Niulanjiang River dammed lakes and blocking lifelines; ② Most of the extracted triggered landslides are belong to bedrock collapses, with small provenance areas, narrow and long circulation areas, and accumulation areas in the form of piles of rocks at the foot of the slope, which have the characteristics of relative bigger affected area but smaller volumes; ③ The coseismic landslides triggered by the LudianM_S6.5 earthquake are consistent with the characteristics of the database of coseismic landslides in mountains and valleys triggered by other strong earthquakes in western China.

Key words: The 2014 Ludian M_S6.5 earthquake, Earthquake-triggered landslide, Niulanjiang River, Remote sensing interpretation, Anatomical earthquake case

中图分类号:

P315.7

肖金宇, 徐岳仁, 刘雷, 张伟恒, 李文巧, 杜朋. 2014年8月3日云南鲁甸M_S6.5地震触发滑坡遥感解译研究[J]. 地震, 2023, 43(4): 101-118.

XIAO Jin-yu, XU Yue-ren, LIU Lei, ZHANG Wei-heng, LI Wen-qiao, DU Peng. Study on Coseismic Landslides Triggered by Ludian M_S6.5 Earthquake, Yunnan Province, on August 3rd, 2014, Using Remote Sensing Images[J]. EARTHQUAKE, 2023, 43(4): 101-118.

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