Collaborative Research: Landslides related to the 2015 Mw7.8 Gorkha earthquake, from ground motion and hazard to geomorphic response

合作研究：与 2015 年 Mw7.8 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: 1640797
• 负责人: Marin Clark
• 金额: $ 28.57万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 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 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1640797&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.

大地震触发的滑坡构成了立即和长时间的危险。同时，这些事件记录了有关地震期间能量释放的宝贵科学信息，这反过来促进了地球表面的侵蚀。尽管对该主题进行了数十年的研究，但大地震的稀有性意味着很少有数据可以评估关键概念。 4月25日的7.8尼泊尔地震为研究地震历史众所周知且地震风险很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，而不是通过地面运动模拟和岩石风化在长期斜率稳定性和滑坡风险上的作用所预测的。此类数据对于改善与全球地震相关的滑坡的预测至关重要。一个多学科的研究团队将将岩土技术方法与坡度碎片的地球化学研究相结合。拟议的研究将包括地震地球物理技术来表征地下和无人驾驶汽车（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。目的是应用前面任何重大地震事件以前无法使用的尖端特征技术。来自斜坡沉积物和河流沉积物的地球化学数据将用于将这些岩土数据放置在风化和侵蚀模型的更广泛的背景下。

项目成果

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

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

Near‐Surface Geomechanical Properties and Weathering Characteristics Across a Tectonic and Climatic Gradient in the Central Nepal Himalaya

• DOI: 10.1029/2021jf006240
• 发表时间: 2021-12
• 期刊: Journal of Geophysical Research: Earth Surface
• 作者: William G. Medwedeff;Marin Clark;D. Zekkos;A. West;D. Chamlagain

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