Numerical investigation of flash flood dynamics due to cascading failures of natural landslide dams

doi:10.3390/atmos11060614

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Numerical investigation of flash flood dynamics due to cascading failures of natural landslide dams
	Yang Qingyuan 3,4; Guan Mingfu 3; Peng Yong 1; Chen Huayong 2
刊名	ENGINEERING GEOLOGY
	2020
卷号	276 页码:614
关键词	Cascading failure Flash flood Hydro-morphodynamic model
ISSN号	0013-7952
DOI	10.3390/atmos11060614
产权排序	4
文献子类	Article
英文摘要	A series of natural landslide dams commonly form in a river valley in mountainous areas. Their failures are frequently triggered by intense rainfall, which may result in severe flash flooding or debris flow in a short period. It is important for risk mitigation to develop greater evidence-based understanding of flood dynamics due to cascading dam failures. Based on detailed hydro-morphodynamic modeling of various scenarios, this study systematically evaluates the formation and evolution of flash floods due to a cascading failure of natural landslide dams. The hydro-morphodynamic model has been shown to be capable of simulating shock-captured flows and resultant morphological changes. In this study, we first calibrate the dynamic model with dedicated experimental data, and then apply it to simulate a variety of designed flash flood scenarios caused by cascading dam failures. Moreover, process-based flood dynamics and their evolution are explored in detail. Results indicate that cascading dam failures in a sloping channel cause an overall amplification of flash flood dynamics in the flow direction, but fluctuation of key hydraulic parameters occurs around each dam. Also, bigger landslide dams prevent upstream flood propagation better, but the blockage of the flows raises the potential flow energy. This implies a higher potential hazard risk in case of 'sudden-onset' failure of the dam. Moreover, the shape characteristic of a channel (straight or with bends) influences the evolution of the flash flood along the sloping channel. The findings enhance the understanding of the formation and evolution mechanisms of flash floods due to cascading failures of natural landslide dams, and hence are beneficial for assessing hazard risk and developing
电子版国际标准刊号	2073-4433
语种	英语
WOS记录号	WOS:000551126400001
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46855]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者	Peng Yong
作者单位	1.State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, China; 2.Key Laboratory of Mountain Hazards and Earth Surface Process, Chinese Academy of Science, Chengdu, China 3.Department of Civil Engineering, University of Hong Kong, Hong Kong, China; 4.Department of Hydraulics, Changjiang River Scientific Research Institute, Wuhan, China;
推荐引用方式 GB/T 7714	Yang Qingyuan,Guan Mingfu,Peng Yong,et al. Numerical investigation of flash flood dynamics due to cascading failures of natural landslide dams[J]. ENGINEERING GEOLOGY,2020,276:614.
APA	Yang Qingyuan,Guan Mingfu,Peng Yong,&Chen Huayong.(2020).Numerical investigation of flash flood dynamics due to cascading failures of natural landslide dams.ENGINEERING GEOLOGY,276,614.
MLA	Yang Qingyuan,et al."Numerical investigation of flash flood dynamics due to cascading failures of natural landslide dams".ENGINEERING GEOLOGY 276(2020):614.