IMHE OpenIR  > 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
Corresponding AuthorHUANG Wei
2014-11
Source PublicationJournal of Mountain Science
Volume11Issue:6Pages:1442-1453
AbstractOne 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.
KeywordGlacier Dam-break Flood Well-balanced 2d Hydrodynamic And Sediment Transport Model Openmp Parallelization
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7413
CollectionJournal of Mountain Science_Journal of Mountain Science-2014_Vol11 No.6
Corresponding AuthorHUANG Wei
Recommended Citation
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.
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