Characterising the post-seismic behaviour of damaged slopes - Nepal 2015

描述受损斜坡的震后行为特征 - 尼泊尔 2015

• 批准号: NE/N007689/1
• 负责人: Nicholas Rosser
• 金额: $ 6.56万
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FN007689%2F1
• 关键词: Characterising; post; seismic; behaviour; damaged

The intense ground-shaking experienced during the 2015 Nepal earthquakes triggered over 3,000 landslides, and left many other mountain slopes heavily damaged. The earthquakes occurred in the winter dry season, a period that is year-on-year relatively inactive in terms of landsliding. Over 80% of rainfall in Nepal occurs in the monsoon, and as a result over 90% of fatal landslides also occur during this period. The risk of destabilizing heavily-damaged slopes that have extensive networks of cracks - that may develop into landslides during the monsoon - needs to be fully understood. The basic understanding of landslide mechanisms, and in particular the behaviour of slopes and landslides after earthquakes, is at present limited by a lack of direct observations of how slopes and landslides change in the months that follow. In this project, working in collaboration with colleagues at the National Society for Earthquake Technology in Nepal, we aim to collect a unique dataset on the changes to cracked slopes during the forthcoming monsoon rainfall. By monitoring landslide movement and how this responds to the monsoon rains, we aim to develop a] new understanding of which types of slopes remain stable, and which continue to move and develop further landslides. Based upon our previous research on landslide mechanics, we will use this data to consider possible future styles of movement and controls upon this process, with a view to improving our understanding of landslide movement, but also to feed directly into earthquake-triggered landslide hazard and risk assessment, both immediately in Nepal, and more widely to other regions that may face similar hazards in the future.

2015 年尼泊尔地震期间发生的强烈地面震动引发了 3,000 多起山体滑坡，并导致许多其他山坡严重受损。此次地震发生在冬季旱季，与去年同期相比，滑坡相对不活跃。尼泊尔80%以上的降雨发生在季风期间，因此90%以上的致命山体滑坡也发生在季风期间。需要充分了解具有广泛裂缝网络的严重受损斜坡不稳定的风险，这些斜坡在季风期间可能发展成山体滑坡。目前，由于缺乏对接下来几个月斜坡和滑坡如何变化的直接观察，对滑坡机制，特别是地震后斜坡和滑坡行为的基本了解受到限制。在这个项目中，我们与尼泊尔国家地震技术学会的同事合作，旨在收集关于即将到来的季风降雨期间裂缝斜坡变化的独特数据集。通过监测山体滑坡运动及其对季风降雨的反应，我们的目标是对哪些类型的斜坡保持稳定、哪些类型继续移动并进一步发展山体滑坡有新的认识。根据我们之前对滑坡力学的研究，我们将使用这些数据来考虑未来可能的移动方式和对此过程的控制，以提高我们对滑坡运动的理解，同时也直接用于地震引发的滑坡灾害和风险评估，无论是在尼泊尔，还是在未来可能面临类似灾害的其他地区。

项目成果

Satellite-based emergency mapping using optical imagery: experience and reflections from the 2015 Nepal earthquakes

• DOI: 10.5194/nhess-18-185-2018
• 发表时间: 2018-01
• 期刊: Natural Hazards and Earth System Sciences
• 影响因子: 4.6
• 作者: Jack G. Williams;N. Rosser;M. Kincey;J. Benjamin;K. Oven;A. Densmore;D. Milledge;T. Robinson

Satellite-based emergency mapping: Landslides triggered by the 2015 Nepal earthquake

基于卫星的应急测绘：2015 年尼泊尔地震引发的山体滑坡

• DOI: 10.5194/nhess-2017-273
• 发表时间: 2017
• 作者: Williams J

Changing significance of landslide Hazard and risk after the 2015 Mw 7.8 Gorkha, Nepal Earthquake

• DOI: 10.1016/j.pdisas.2021.100159
• 发表时间: 2021-03
• 期刊: Progress in Disaster Science
• 影响因子: 6.3
• 作者: N. Rosser;M. Kincey;K. Oven;A. Densmore;T. Robinson;D. S. Pujara;R. Shrestha;Jakub Smutny

The control of earthquake sequences on hillslope stability

• DOI: 10.1002/2016gl071879
• 发表时间: 2017-01
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: M. Brain;N. Rosser;N. Tunstall