標題: Two-Dimensional Nonequilibrium Noncohesive and Cohesive Sediment Transport Model
作者: Hung, M. C.
Hsieh, T. Y.
Wu, C. H.
Yang, J. C.
土木工程學系
防災與水環境研究中心
Department of Civil Engineering
Disaster Prevention and Water Environment Research Center
公開日期: 1-May-2009
摘要: The purpose of this paper is to develop an unsteady 2D depth-averaged model for nonuniform sediment transport in alluvial channels. In this model, the orthogonal curvilinear coordinate system is adopted; the transport mechanisms of cohesive and noncohesive sediment are both embedded; the suspended load and bed load are treated separately. In addition, the processes of hydraulic sorting, armoring, and bed consolidation are also included in the model. The implicit two-step split-operator approach is used to solve the flow governing equations and the coupling approach with iterative method are used to solve the mass-conservation equation of suspended sediment, mass-conservation equation of active-layer sediment, and global mass-conservation equation for bed sediment simultaneously. Three sets of data, including suspension transport, degradation and aggradation cases for noncohesive sediment, and aggradation, degradation, and consolidation cases for cohesive sediment, have been demonstrated to show the rationality and accuracy of the model. Finally, the model is applied to evaluate the desilting efficiency for Ah Gong Diann Reservoir located in Taiwan to show its applicability.
URI: http://dx.doi.org/10.1061/(ASCE)0733-9429(2009)135:5(369)
http://hdl.handle.net/11536/7313
ISSN: 0733-9429
DOI: 10.1061/(ASCE)0733-9429(2009)135:5(369)
期刊: JOURNAL OF HYDRAULIC ENGINEERING-ASCE
Volume: 135
Issue: 5
起始頁: 369
結束頁: 382
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