A simplified physically based coupled rainfall threshold model for triggering landslides
文献类型：SCI/SSCI论文
| 作者 | Wu Y. M.; Lan, H. X.; Gao, X.; Li, L. P.; Yang, Z. H. |
| 发表日期 | 2015 |
| 关键词 | Rainfall threshold Physically based coupled model Infinite slope stability model Darcy's law Shallow landslides shallow landslides duration control debris flows region prediction washington intensity seattle system usa |
| 英文摘要 | A number of rainfall threshold models for triggering landslides have been developed in either empirical or physical manner. The objective of an empirical rainfall threshold model is to establish a relationship between rainfall intensity and duration, which is a line on a log log diagram, although the mechanism of the relationship following the power law is not yet well understood. The sufficiency of rainfall and landslide data is also a significant concern for empirical models. A simplified physically based rainfall threshold model is developed by coupling the Mohr Coulomb law and Darcy's law based on the assumptions that the slope has an infinite length and that discrete water diffusion is physically based. The power-law mechanism for the relationship between rainfall intensity and duration for the initiation of a landslide is investigated using this physically based model. The rainfall threshold calculated with the model shows that the threshold follows the power law for short rainfall durations whereas it gradually tends towards a constant value for long rainfall durations. Case studies have shown that a plausible threshold for regions that lack sufficient landslide and rainfall data can be obtained via the model. The model is also applied to cases which occurred in regions geologically typical of Fujian Province, southeast China. The landslide distribution predicted by our model accords with the interpretation of high resolution satellite imagery, and this suggests that the proposed physically based model also effectively determines rainfall thresholds for triggering regional landslides. (C) 2015 Elsevier B.V. All rights reserved. |
| 出处 | Engineering Geology |
| 卷 | 195 |
| 页 | 63-69 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0013-7952 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38946]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Wu Y. M.,Lan, H. X.,Gao, X.,et al. A simplified physically based coupled rainfall threshold model for triggering landslides. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。