Collaborative Research: Landslides related to the 2015 Mw 7.8 Gorkha earthquake, from ground motion and hazard to geomorphic response

合作研究：与 2015 年 7.8 级廓尔喀地震相关的山体滑坡，从地面运动和灾害到地貌响应

• 批准号: 1640894
• 负责人: A Joshua West
• 金额: $ 24.8万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-01 至 2021-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1640894&HistoricalAwards=false
• 关键词: Collaborative; Research; Landslides; related; 2015

Landslides triggered by large earthquakes pose immediate and prolonged hazards. At the same time, these events record valuable scientific information about energy release during earthquakes, which in turn promotes erosion of the Earth's surface. Despite decades of research on this topic, the rarity of large earthquakes means that there is little data by which to evaluate key concepts. The April 25th magnitude 7.8 earthquake in Nepal offers the opportunity to study a region where the earthquake history is well known and seismic risk is high. Results from this project will evaluate patterns of seismic energy release not predicted by ground motion simulations and roles of rock weathering on long-term slope stability and landslide risk. Such data is essential for improving prediction of landslides related to earthquakes worldwide. A multi-disciplinary research team will couple geotechnical approaches to slope stability with geochemical studies of the slope debris. The proposed research will include seismic geophysical techniques to characterize the subsurface and an application of unmanned aerial vehicles (UAVs, or drones) to characterize the material properties of the rocks that failed in landslides. The intent is to apply cutting edge characterization techniques that were previously unavailable for any past major earthquake event. Geochemistry data from the slope deposits and river sediment will be used to place these geotechnical data within a broader context of weathering and erosion models.

由大地震引发的滑坡会造成即时和长期的危害。与此同时，这些事件记录了关于地震期间能量释放的宝贵科学信息，而地震反过来又促进了地球表面的侵蚀。尽管对这一主题进行了数十年的研究，但大地震的罕见性意味着几乎没有数据来评估关键概念。4月25日尼泊尔发生的7.8级地震为研究一个地震历史众所周知、地震风险高的地区提供了机会。该项目的结果将评估地震能量释放的模式，而地震能量释放模式不是通过地面运动模拟预测的，以及岩石风化对长期边坡稳定性和滑坡风险的作用。这些数据对于改善全世界与地震有关的滑坡预测至关重要。一个多学科研究小组将把斜坡稳定性的岩土工程方法与斜坡碎片的地球化学研究结合起来。拟议的研究将包括地震地球物理技术，以表征地下和无人驾驶飞行器（无人机或无人机）的应用，以表征在滑坡中失败的岩石的材料特性。其目的是应用以前无法用于任何过去的大地震事件的尖端表征技术。将利用斜坡沉积物和河流沉积物的地球化学数据，将这些岩土工程数据置于更广泛的风化和侵蚀模型范围内。

项目成果

Landslide-driven drainage divide migration

• DOI: 10.1130/g39916.1
• 发表时间: 2018-05-01
• 期刊: GEOLOGY
• 影响因子: 5.8
• 作者: Dahlquist, Maxwell P.;West, A. Joshua;Li, Gen
• 通讯作者: Li, Gen

Earthquakes drive focused denudation along a tectonically active mountain front

• DOI: 10.1016/j.epsl.2017.04.040
• 发表时间: 2017-08
• 期刊: Earth and Planetary Science Letters
• 影响因子: 5.3
• 作者: Gen K. Li;A. West;A. Densmore;Zhangdong Jin;Fei Zhang;Jin Wang;M. Clark;Robert G. Hilton

Observations of Landslides Caused by the April 2015 Gorkha, Nepal, Earthquake Based on Land, UAV, and Satellite Reconnaissance

• DOI: 10.1193/121616eqs237m
• 发表时间: 2017-12
• 期刊: Earthquake Spectra
• 影响因子: 5
• 作者: D. Zekkos;M. Clark;M. Whitworth;W. Greenwood;A. West;K. Roback;Gen K. Li;D. Chamlagain

Competing Effects of Mountain Uplift and Landslide Erosion Over Earthquake Cycles

• DOI: 10.1029/2018jb016986
• 发表时间: 2019-05-01
• 期刊: JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
• 影响因子: 3.9
• 作者: Li, Gen;West, A. Joshua;Qiu, Hongrui
• 通讯作者: Qiu, Hongrui

Characteristic landslide distributions: An investigation of landscape controls on landslide size

• DOI: 10.1016/j.epsl.2020.116203
• 发表时间: 2020-06
• 期刊: Earth and Planetary Science Letters
• 影响因子: 5.3
• 作者: William G. Medwedeff;M. Clark;D. Zekkos;A. West