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

基本信息

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

项目摘要

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.

大地震引发的山体滑坡会造成直接和长期的危害。与此同时，这些事件记录了有关地震期间能量释放的宝贵科学信息，这反过来又促进了地球表面的侵蚀。尽管对此主题进行了数十年的研究，但大地震的罕见性意味着用于评估关键概念的数据很少。 4 月 25 日尼泊尔发生的 7.8 级地震提供了研究地震历史众所周知且地震风险很高的地区的机会。该项目的结果将评估地面运动模拟未预测到的地震能量释放模式以及岩石风化对长期斜坡稳定性和滑坡风险的作用。此类数据对于改进全球地震相关山体滑坡的预测至关重要。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来表征地下特征，以及应用无人机（UAV或无人机）来表征滑坡中破裂的岩石的材料特性。其目的是应用以前无法用于任何过去的重大地震事件的尖端表征技术。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置于更广泛的风化和侵蚀模型背景中。

项目成果

期刊论文数量（7）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

The size, distribution, and mobility of landslides caused by the 2015 M w 7.8 Gorkha earthquake, Nepal

2015 年尼泊尔 7.8 级廓尔喀地震引起的山体滑坡的规模、分布和流动性

DOI：
10.1016/j.geomorph.2017.01.030
发表时间：
2018-01
期刊：
Geomorphology
影响因子：
3.9
作者：
Roback, Kevin;Clark, Marin K.;West, A. Joshua;Zekkos, Dimitrios;Li, Gen;Gallen, Sean F.;Chamlagain, Deepak;Godt, Jonathan W.
通讯作者：
Godt, Jonathan W.

Earthquakes drive focused denudation along a tectonically active mountain front

地震导致沿构造活跃的山前集中剥蚀

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：
Li, Gen;West, A. Joshua;Densmore, Alexander L.;Jin, Zhangdong;Zhang, Fei;Wang, Jin;Clark, Marin;Hilton, Robert G.
通讯作者：
Hilton, Robert G.

Initiation and Runout of Post‐Seismic Debris Flows: Insights From the 2015 Gorkha Earthquake

震后泥石流的引发和流出：2015 年廓尔喀地震的见解