Hazards SEES Type 1: Predicting Landslide Runout and Granular Flow Hazard: Enhanced-g Centrifuge Experiments, Contact Dynamics Model Development and Theoretical Study

该项目的广泛目标是解决山体滑坡和泥石流的不可预测性问题，提高社会在面对世界各地日益严重的山体滑坡灾害和风险时的复原力和可持续性。山体滑坡和泥石流是自然灾害的常见诱因，它们构成了一个特别的挑战，因为它们的时间、位置、规模和对基础设施和人民的影响是出了名的难以预测。这种不可预测性削弱了社会做出准确风险评估、制定安全设计原则或执行健全工程规范的能力。这个项目正由一个由计算机科学家、工程师和地球科学家组成的跨学科团队共同致力于实验室实验和数值模拟。这项研究围绕着在最先进的岩土工程离心机上进行的增强型G实验。这些实验旨在测量在一系列模拟尺度上驱动和抵抗滑坡运动的力，指导模拟这种运动的数值算法的开发，并帮助建立可简单应用于现实世界问题的连续介质模型。实验结果将作为建立共享实验室数据的最佳做法的新社区倡议的一部分进行传播。尖端的、开源的3D接触动力学代码，专为处理侵蚀颗粒流及其对环境的影响而量身定做，提供了一种宝贵的新的交叉资源。该项目促进了与从事最近台风和地震灾害后颗粒流危害的实验研究和现场评估的海外工程师和地球科学家的新的国际合作。在一个学科广度不同寻常的项目中，为两名早期职业研究人员和一名研究生提供了指导。

The broad goal of this project is to address the unpredictability of landslides and debris flows and to boost societal resilience and sustainability in the face of growing landslide hazard and risk across the world. Landslides and debris flows are frequent agents of natural disaster and they pose a particular challenge because their timing, location, size and impact on infrastructure and people are notoriously hard to predict. Such unpredictability undermines society's ability to make accurate risk assessments, to frame safe design principles or to enforce sound engineering codes. This project is being tackled by an interdisciplinary team of computer scientists, engineers and geoscientists working together on laboratory experiments and numerical simulations. The research is framed around enhanced-g experiments conducted on a state-of-the-art geotechnical centrifuge.These experiments are designed to measure the forces driving and resisting landslide motion across a range of simulated scales, to guide development of numerical algorithms to simulate such motion, and to help in the framing of continuum models that can be applied simply to real world problems. The experimental results are to be disseminated as part of a new community initiative for establishing best practices for the sharing of laboratory data. Cutting-edge, open-source, 3d contact dynamics code, tailored to handling eroding granular flows and their impact on the environment, provides a valuable new cross-cutting resource. The project fosters new international collaboration with overseas engineers and geoscientists engaged in both experimental studies and in field assessments of granular flow hazards following recent typhoon and earthquake disasters. Mentoring is provided for two early career researchers and a graduate student in a project of unusual disciplinary breadth.