Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR030688 |
Erosion Process of Multiple Debris Flow Surges Caused by Check Dam Removal: An Experimental Study | |
Xi'an Wang; Jiangang Chen; Huayong Chen; Xiaoqing Chen; Shuai Li; Wanyu Zhao | |
2022-02-14 | |
发表期刊 | Water Resources Research |
出版年 | 2022 |
英文摘要 | Debris flows are one of the most serious natural disasters on Earth and cause great losses in human life and property each year. Check dams have been widely utilized in debris flow hazard mitigation, and over time, some control projects have exceeded their designed service lifetime. However, the processes of stored sediment erosion with multiple surges of debris flows after check dam removal are unknown. Here, the stored sediment erosion processes associated with different reductions in the dam height (i.e., the removed height) were revealed by physical experiments. The results showed that erosion was concentrated on the stored sediment scarp formed by dam removal and that the erosion process mainly included undercutting and widening. The erosion efficiency of the debris flow gradually decreased with the development of erosion and was positively correlated with removed height, negatively correlated with the accumulated debris flow volume, and proportional to the remaining potential volume of sediment to be eroded. The erosion volume development process was well described by an exponential function model, and the physical meanings of the parameters in the model and their empirical values were clarified. Moreover, the distribution of the erosion volume along the flume was shown to satisfy the Weibull distribution, and the distribution parameters were related to the removed height, erosion volume and sediment volume fraction of the debris flow. We anticipate that our results will serve as a starting point for the demolition and reconstruction of debris flow hazard mitigation engineering in mountainous areas. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/346672 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Xi'an Wang,Jiangang Chen,Huayong Chen,et al. Erosion Process of Multiple Debris Flow Surges Caused by Check Dam Removal: An Experimental Study[J]. Water Resources Research,2022. |
APA | Xi'an Wang,Jiangang Chen,Huayong Chen,Xiaoqing Chen,Shuai Li,&Wanyu Zhao.(2022).Erosion Process of Multiple Debris Flow Surges Caused by Check Dam Removal: An Experimental Study.Water Resources Research. |
MLA | Xi'an Wang,et al."Erosion Process of Multiple Debris Flow Surges Caused by Check Dam Removal: An Experimental Study".Water Resources Research (2022). |
条目包含的文件 | 条目无相关文件。 |
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。
修改评论