RAPID Collaborative Research: Landslides caused by the April 2015 Nepal earthquakes, from immediate hazard to tectonic driver

对项目的非技术描述，它解释了项目的意义和重要性。滑坡在世界上许多山区是一个持续的威胁，在容易发生大地震的地区，危险增加了。尽管存在这种联系，但关于地震事件能在多大程度上引发滑坡的知识还很初级。该RAPID项目将利用卫星图像分析2015年4月尼泊尔大地震和余震后山体滑坡的分布。研究小组还将进行实地工作，记录移动的材料的数量，评估随后重新动员山体滑坡的威胁，并提供所需的证据，以便更准确地预测其他山体滑坡易发地区的危险程度。该RAPID项目将(1)根据高分辨率卫星图像绘制喜马拉雅地区的滑坡地图，并探索在地震前后建立高分辨率数字高程模型的努力；(2)通过实地测量和摄影测量分析来表征滑坡几何形状，使严格确定滑坡体积成为可能；(3)建立和实施泥沙路径模型，识别和监测泥沙运移；(4)收集和分析样品的基线地球化学指标，以期深入了解侵蚀和沉积物运输，优先考虑碎屑宇宙成因铍同位素和铀钍/氦比率，同时补充监测河流溶质化学的变化。学生将积极参与研究的各个方面。

A non-technical description of the project, which explains the project's significance and importanceLandslides are a continual threat in many mountainous regions of the world and the danger is increased in areas prone to large earthquakes. In spite of this association, knowledge concerning the extent to which seismic events can trigger landslides is rudimentary. This RAPID project will use satellite images to analyze the distribution of landslides following the large earthquake and aftershocks in Nepal of April, 2015. Field work will also be conducted by the research team to document the volume of material that has moved, evaluate the threat for subsequent remobilization of the landslides, and provide the evidence needed to more accurately predict the hazard level in other landslide-prone regions.A technical description of the projectThis RAPID project will (1) develop landslide maps from high resolution satellite imagery along the Himalaya and explore efforts to build high resolution Digital Elevation Models from before and after the earthquake; (2) characterize landslide geometries through field measurements and photogrammetric analysis, making it possible to rigorously determine landslide volumes; (3) develop and implement a sediment routing model to identify and monitor sediment transport; and (4) collect and analyze samples for baseline geochemical indexes that promise insight into erosion and sediment transport, with a priority on detrital cosmogenic beryllium isotopes and uranium-thorium/helium ratios, together with complementary efforts to monitor changes in river solute chemistry. Students will be actively engaged in all aspects of the research.