首页|积石山Ms 6.2级和泸定Ms 6.8级地震地质灾害发育规律对比

积石山Ms 6.2级和泸定Ms 6.8级地震地质灾害发育规律对比

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2023年积石山Ms 6.2级地震是继2022年泸定Ms 6.8级地震后在青藏高原东缘—东北缘地区发生的又一次强震事件.2次地震均诱发大量地震地质灾害,但由于发震断层类型、地质和地貌等条件的差异,2次地震地质灾害发育分布规律呈现显著的差异性.为揭示不同震区地震地质灾害发育规律,本研究采用地面调查、遥感解译和空间叠加统计等方法,对比分析了积石山和泸定地震地质灾害发育分布特征和控灾因子.结果表明:断层类型控制了同震地质灾害的发育优势坡向和垂向空间展布,即"背向坡效应"和"上下盘效应";地貌条件是影响同震地质空间分布的主要因子,即川西高山峡谷地貌中"线状"分布和陇西黄土地貌中"面状"分布;特殊土体类型、气候、植被覆盖等差异性是同震地质灾害调查与应急处置中需要重点关注的因子.本次研究可为不同断层类型和不同地貌区同震地质灾害重点防范区范围划定、趋势预测和灾后重建提供科学参考.
Comparative research of the characteristics of geological hazards induced by the Jishishan(Ms 6.2)and Luding(Ms 6.8)earthquakes
The 2023 Jishishan earthquake(Ms 6.2)was another strong earthquake that occurred in the eastern/northeastern margin of the Qinghai-Tibet Plateau after the 2022 Luding earthquake(Ms 6.8).Both earthquakes triggered large numbers of co-seismic landslides.To reveal the differences of the distributions and control factors of co-seismic landslides caused by the Jishishan and Luding earthquakes,distribution maps of co-seismic landslides were compared and analyzed using ground survey data,remote sensing interpretation data,and spatial superposition statistics.The results showed that the fault type controlled the dominant slope direction of co-seismic landslides as well as the spatial distribution along the vertical fault,where the"back slope"effect and"up-fault and down-fault"effect were clearly identified.Geomorphic conditions were the main factors affecting the spatial distribution characteristics of co-seismic landslides.The distribution of co-seismic landslides was"linear"in the mountain and canyon landforms in western Sichuan,and"planar"in the loess landforms in Longxi.Attention should be given to the differences of special soil type,climate,and vegetation cover in investigations and emergency treatment of co-seismic landslides.This research provided a scientific reference for the delineation of the key prevention areas of co-seismic landslides in different fault types and different geomorphic areas,including trend predictions and the post-disaster reconstruction.

Jishishan earthquakeLuding earthquakecomparative research of co-seismic landslidesdistribution characteristics of co-seismic landslideshazard control factors

铁永波、张宪政、曹佳文、秦雅东、王立朝、董英、郭富赟、郭兆成、白永健、冉涛、侯圣山、王涛、高波、卢佳燕、李光辉、宁志杰、向炳霖、孙才

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中国地质调查局成都地质调查中心(西南地质科技创新中心),成都 610081

自然资源部地质灾害风险防控工程技术创新中心,成都 611734

自然资源部成都地质灾害野外科学观测研究站,成都 610000

中国地质调查局,北京 100037

中国地质环境监测院(自然资源部地质灾害技术指导中心),北京 100081

中国地质调查局西安地质调查中心(西北地质科技创新中心),西安 710119

甘肃省地质环境监测院,兰州 730000

中国自然资源航空物探遥感中心,北京 100083

中国地质科学院地质力学研究所,北京 100081

中国地质科学院,北京 100037

成都理工大学,成都 610059

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积石山地震 泸定地震 地震地质灾害对比研究 同震滑坡分布特征 控灾因子

国家自然科学基金项目中国地质调查局地质调查项目中国地质调查局地质调查项目中央引导地方科技发展资金项目

U20A20110-01DD20221746DD202300863ZYQA03262

2024

10.3969/j.issn.1671-9727.2024.01.02

成都理工大学学报(自然科学版)
成都理工大学

成都理工大学学报(自然科学版)

CSTPCD北大核心
影响因子：1.596
ISSN：1671-9727
年,卷(期)：2024.51(1)
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