Numerical study on the evolution process of a geohazards chain resulting from the Yigong landslide,Landslides

当前位置： X-MOL 学术 › Landslides › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Numerical study on the evolution process of a geohazards chain resulting from the Yigong landslide
Landslides ( IF 6.7 ) Pub Date : 2020-10-13 , DOI: 10.1007/s10346-020-01448-w
Gordon G. D. Zhou , Pamela Jessica Cacela Roque , Yunxu Xie , Dongri Song , Qiang Zou , Huayong Chen

Geohazard chain processes in mountainous areas generally entail a landslide, followed by a dammed lake, a dam breach, and then outburst flooding. These chains have greater destructive power and a larger area of coverage than a single process, of which a representative event is the April 2000 Yigong landslide in Tibet, China. In this study, a two-part, numerical back-analysis of the entire chain process is carried out. Enhanced one-layer Savage-Hutter models, which incorporate a multiscale, empirical friction model (velocity-weakening) and appropriate erosion mechanics, are solved using a non-staggered central differencing scheme. A reasonable reproduction of the geohazard event chain was obtained. Results show that the use of the multiscale friction law is able to reproduce the dynamic process of the landslide with acceptable accuracy. In addition, the variation of soil shear resistance along the dam depth (against the water flow above) during the dam breach is considered in the study, in which the outburst flooding process is better modeled. The numerical results, validated by field measurements, provide reliable assessment and interpretation of the actual event.

更新日期：2020-10-13

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>