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http://dx.doi.org/10.3741/JKWRA.2012.45.2.217

A Quasi-Steady Model for Sedimentation and Flushing of Reservoirs  

Choi, Sung-Uk (Department of Civil & Environmental Engineering, Yonsei University)
Choi, Seong-Wook (Department of Civil & Environmental Engineering, Yonsei University)
Publication Information
Journal of Korea Water Resources Association / v.45, no.2, 2012 , pp. 217-227 More about this Journal
Abstract
This paper presents a quasi-steady model for numerical simulations of reservoir sedimentation and reservoir flushing. The quasi-steady model is based on the assumption that the flow is steady with time-dependent stream morphology change. This is reasonable because stream morphology changes over a long period, while the flow changes rapidly. The proposed model is first applied to two laboratory experiments for reservoir sedimentation. The channel is shown to be adjusted to new sediment supply at the upstream by changing both the flow depth and slope. Simulated water surface and bed profiles compare favorably to measured data. The model is also applied to reservoir flushing. Good agreement between simulated and measured data is not obtained due to time variation of outflow generated to facilitate the flushing in the experiment. Finally, relationships for equilibrium flow depth and bed slope are proposed and tested through numerical experiments.
Keywords
quasi-steady model; reservoir sedimentation; reservoir flushing; sediment transport; equilibrium flow depth; equilibrium bed slope;
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1 류태상, 윤용진, 이규탁(2010). 기존 댐 생애주기 연장사업 및 저사댐 소개. 한국수자원학회지, 한국수자원학회, 제 43권, 제 4호, pp. 84-88.
2 Cantelli, A., Paola, C., and Parker, G. (2004). Experiments on upstream migrating erosional narrowing and widening of an incisional channel caused by dam removal. Water Resources Research, AGU, 40(WO 3304).   DOI
3 Fasolato, G., Ronco, P., Langendoen, E.J., and Di Silvio, G. (2011). Validity of uniform flow hypothesis in one-dimensional morphodynamic models. Journal of Hydraulic Engineering, ASCE, Vol. 137, No. 2, 183-195.   DOI   ScienceOn
4 Fread, D.L., and Harbaugh, T.E. (1971). Open-channel profiles by Newton's iteration technique. Journal of Hydrology, Vol. 13, No. 1, pp. 70-80.   DOI
5 Garcia, M. (1999). Chapter 6. Sedimentation and erosion hydraulics. Hydraulic Design Handbook. (edited by L.W. Mays), McGraw Hill, NY.
6 Holly, F.M., and Rahuel, J.L. (1990). New numerical/ physical framework for mobile bed modeling. Part I: Numerical and physical principles. Journal of Hydraulic Research, IAHR, Vol. 28, No. 4, pp. 401-416.   DOI
7 Hotchkiss, R. (1989). Reservoir sedimentation and sediment sluicing: Experimental and numerical analysis. Ph.D. thesis, Department of Civil Engineering, the University of Minnesota, Twin City, MN.
8 Hotchkiss, R., and Parker, G. (1991). Shock fitting of aggradational profiles due to backwater. Journal of Hydraulic Engineering, ASCE, Vol. 117, No. 9, pp. 1129-1144.   DOI
9 Krishnappan, B. (1985). Modelling of unsteady flows in alluvial streams. Journal of Hydraulic Engineering, ASCE, Vol. 111, No. 2, pp. 257-266.   DOI   ScienceOn
10 Lai, J.S. and Shen, H.W. (1996). Flushing sediment through reservoirs. Journal of Hydraulic Research, IAHR, Vol. 34, No. 2, pp. 237-255.   DOI   ScienceOn
11 Morris, G.L., Annandale, G., and Hotchkiss, R. (2007). Chapter 12. Reservoir Sedimentation, Sedimentation Engineering (edited by M.H. Garcia), American Society of Civil Engineers, Reston, VA.
12 Parker, G. (2004). 1d sediment transport morphodyna mics with applications to rivers and turbidity currents, e-book.
13 Soni, J.P., Garde, R.J., and Ranga Raju, K.G. (1980). Aggradation in stream due to overloading. Journal of the Hydraulics Division, ASCE, Vol. 106, No. 1, pp. 117-132.
14 Vreugdenhil, C.B., and de Vries, M. (1967). Computations of non-steady bedload transport by a pseudo-viscosity method. Delft Hydraulics Laboratory Publication No. 45, Delft Hydraulics Laboratory, Delft, The Netherland.
15 Wong, M., and Parker, G. (2006). Reanalysis and correction of bed-load relation of Meyer-Peter and Muller using their own data. Journal of Hydraulic Engineering, ASCE, Vol. 132, No. 11, pp. 1159-1168.   DOI   ScienceOn
16 Kassem, A., and Chaudry, M. (1998). Comparison of coupled and decoupled numerical models for alluvial channels. Journal of Hydraulic Engineering, ASCE, Vol. 124, No. 8, pp. 794-802.   DOI   ScienceOn