Distribution characteristics and cumulative effects of landslides triggered by multiple moderate-magnitude earthquakes: a case study of the comprehensive seismic impact area in Yibin, Sichuan, China

IF 5.8 2区 工程技术 Q1 ENGINEERING, GEOLOGICAL Landslides Pub Date : 2024-08-24 DOI:10.1007/s10346-024-02351-4
Yuandong Huang, Chong Xu, Xiangli He, Jia Cheng, Yu Huang, Lizhou Wu, Xiwei Xu
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Abstract

Sichuan Province, as one of the active seismic regions in China, has historically suffered from strong earthquakes. The Xingwen Ms5.7 earthquake in 2018 and the Changning Ms6.0 earthquake in 2019, two moderate-magnitude earthquakes that occurred in Sichuan Province in recent years, happened in quick succession and triggered numerous landslides under similar geological structural conditions. These events provide a rare case study for researching the distribution characteristics and cumulative effects of landslides triggered by multiple earthquakes. This study aims to explore the distribution characteristics and superposition effects of landslides from these two earthquakes and to reveal the complexity and regularity of landslides triggered by multiple moderate magnitude earthquakes by comparing and analyzing the spatial distribution, scale size, and influence factors of landslides from the two earthquakes. The results show that 455 landslides were triggered by the Xingwen earthquake event and 511 landslides were triggered by the Changning earthquake event. The landslides are all mainly small and medium-sized, covering a total area of about 2.33 km2, with similar area frequency distribution trends. There is a certain correlation between the number and area of landslides and each factor. In addition, the landslides are mainly distributed in the middle and lower slopes of slower slopes, and the landslide H/L values are positively correlated with the slope gradient. This study reveals the spatial distribution characteristics and morphological parameter features of landslides triggered by the two earthquakes and their aftershocks, which provides a reference basis for landslide hazard assessment and risk management, as well as a case study and inspiration for the study of landslides under the action of multiple earthquakes.

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多次中强地震引发滑坡的分布特征和累积效应:四川宜宾综合地震影响区案例研究
四川省作为中国地震活跃区之一,历史上强震频发。2018 年兴文 Ms5.7 地震和 2019 年长宁 Ms6.0 地震是四川省近年来发生的两次中强地震,这两次地震接连发生,在相似的地质构造条件下引发了大量滑坡。这些事件为研究多次地震引发滑坡的分布特征和累积效应提供了难得的案例。本研究旨在通过对比分析两次地震滑坡的空间分布、规模大小和影响因素,探讨两次地震滑坡的分布特征和叠加效应,揭示多次中等震级地震引发滑坡的复杂性和规律性。结果表明,兴文地震事件引发了 455 个滑坡,长宁地震事件引发了 511 个滑坡。滑坡均以中小型滑坡为主,总面积约为 2.33 平方公里,面积频率分布趋势相似。滑坡的数量和面积与各因素之间存在一定的相关性。此外,滑坡主要分布在坡度较缓的中下坡,滑坡 H/L 值与坡度呈正相关。本研究揭示了两次地震及其余震引发滑坡的空间分布特征和形态参数特征,为滑坡灾害评估和风险管理提供了参考依据,也为多地震作用下滑坡的研究提供了案例和启示。
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来源期刊
Landslides
Landslides 地学-地球科学综合
CiteScore
13.60
自引率
14.90%
发文量
191
审稿时长
>12 weeks
期刊介绍: Landslides are gravitational mass movements of rock, debris or earth. They may occur in conjunction with other major natural disasters such as floods, earthquakes and volcanic eruptions. Expanding urbanization and changing land-use practices have increased the incidence of landslide disasters. Landslides as catastrophic events include human injury, loss of life and economic devastation and are studied as part of the fields of earth, water and engineering sciences. The aim of the journal Landslides is to be the common platform for the publication of integrated research on landslide processes, hazards, risk analysis, mitigation, and the protection of our cultural heritage and the environment. The journal publishes research papers, news of recent landslide events and information on the activities of the International Consortium on Landslides. - Landslide dynamics, mechanisms and processes - Landslide risk evaluation: hazard assessment, hazard mapping, and vulnerability assessment - Geological, Geotechnical, Hydrological and Geophysical modeling - Effects of meteorological, hydrological and global climatic change factors - Monitoring including remote sensing and other non-invasive systems - New technology, expert and intelligent systems - Application of GIS techniques - Rock slides, rock falls, debris flows, earth flows, and lateral spreads - Large-scale landslides, lahars and pyroclastic flows in volcanic zones - Marine and reservoir related landslides - Landslide related tsunamis and seiches - Landslide disasters in urban areas and along critical infrastructure - Landslides and natural resources - Land development and land-use practices - Landslide remedial measures / prevention works - Temporal and spatial prediction of landslides - Early warning and evacuation - Global landslide database
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