Coupled 2D Hydrodynamic and Sediment Transport Modeling of Megaflood due to Glacier Dam-break in Altai Mountains, Southern Siberia

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 > Journal of Mountain Science > Journal of Mountain Science-2014 > Vol11 No.6

	Coupled 2D Hydrodynamic and Sediment Transport Modeling of Megaflood due to Glacier Dam-break in Altai Mountains, Southern Siberia
	HUANG Wei ; CAO Zhi-xian ; Paul CARLING ; Gareth PENDER
刊名	Journal of Mountain Science
	2014-11
卷号	11 期号:6 页码:1442-1453
关键词	Glacier dam-break flood Well-balanced 2D hydrodynamic and sediment transport model OpenMP parallelization
通讯作者	HUANG Wei
英文摘要	One of the largest known megafloods on earth resulted from a glacier dam-break, which occurred during the Late Quaternary in the Altai Mountains in Southern Siberia. Computational modeling is one of the viable approaches to enhancing the understanding of the flood events. The computational domain of this flood is over 9460 km2 and about 3.784  106 cells are involved as a 50 m  50 m mesh is used, which necessitates a computationally efficient model. Here the OpenMP (Open Multiprocessing) technique is adopted to parallelize the code of a coupled 2D hydrodynamic and sediment transport model. It is shown that the computational efficiency is enhanced by over 80% due to the parallelization. The floods over both fixed and mobile beds are well reproduced with specified discharge hydrographs at the dam site. Qualitatively, backwater effects during the flood are resolved at the bifurcation between the Chuja and Katun rivers. Quantitatively, the computed maximum stage and thalweg are physically consistent with the field data of the bars and deposits. The effects of sediment transport and morphological evolution on the flood are considerable. Sensitivity analyses indicate that the impact of the peak discharge is significant, whilst those of the Manning roughness, medium sediment size and shape of the inlet discharge hydrograph are marginal.
收录类别	SCI
公开日期	2014-11-18
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/7413]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2014_Vol11 No.6
推荐引用方式 GB/T 7714	HUANG Wei,CAO Zhi-xian,Paul CARLING,et al. Coupled 2D Hydrodynamic and Sediment Transport Modeling of Megaflood due to Glacier Dam-break in Altai Mountains, Southern Siberia[J]. Journal of Mountain Science,2014,11(6):1442-1453.
APA	HUANG Wei,CAO Zhi-xian,Paul CARLING,&Gareth PENDER.(2014).Coupled 2D Hydrodynamic and Sediment Transport Modeling of Megaflood due to Glacier Dam-break in Altai Mountains, Southern Siberia.Journal of Mountain Science,11(6),1442-1453.
MLA	HUANG Wei,et al."Coupled 2D Hydrodynamic and Sediment Transport Modeling of Megaflood due to Glacier Dam-break in Altai Mountains, Southern Siberia".Journal of Mountain Science 11.6(2014):1442-1453.