Development of a computational Procedure for Optimum Sediment Removal: Application to case of Roseires Hydropower Intakes
Hydropower generation is one of the key purposes that dams were built for. World-wide the sustainability of hydropower operation is deprived and threatened by the alarming rate of reservoir sedimentation. The situation is even worst for the cases where the sediment delta has propagated and reached the dam site. Various sediment management practices have been employed to cope with the problem at a huge amount of cost. This paper analyses the sedimentation problem and the impact on hydropower generation in Roseires reservoir, in Sudan. An economical reservoir sediment management plan such as Hydro-suction dredging technique is suggested. The deposited sediment should be agitated before being bypassed to the downstream via a pipeline that makes use of the natural hydraulic head of water. A detailed design procedure is outlined and guidelines for the optimization are presented. The procedure is theoretically illustrated by applying it to remove the annual deposited sediment ahead of Roseires Hydropower intakes in Sudan. It was concluded that such system is cost effective when compared to costs incurred in tackling the effect of siltation in front of hydropower intakes.
K. Mohmood, Reservoir Sedimentation: Impact, Extent, and Mitigation. World Bank Technical Report Number 71, 1987, The World bank, Washington, D.C
G. L. Morris, and J. Fan, Reservoir sedimentation hand-book, New York, McGraw-Hill, 1998.
S. A. Kantoush, T. Sumi, and Y. Takemon, “Lighten the load,” International water power and dam construction, PP 38–45, 2011.
G. M. Kondolf, Y. Gao, G. W. Annandale,G. L. Morris, E. Jiang, J. Zhang, P. Carling, K. Fu, Q. Guo, R. Hotchkiss, C. Peteuil, T. Sumi, H. W. Wang, Z. Wang, Z. Wei, B. Wu, and C. T. Yang, (2014). “Sustainable sediment management in reservoirs and regulated rivers: Experiences from five continents”. Earth’s Future 2(5), pp. 256-280, 2014.
G. R. Basson, and A. Rooseboom, Dealing with Reservoir Sedimentation- Dredging, Water Research Commission Report No. TT 110/99, ISBN 1 86845 4932, South Africa, 1999.
M. Meshkati Shahmirzadi, T. Sumi, S. A. Kantoush,T. Temmyo, “Influence of Air Injection on Suction Power and Pressure Gradient in Dredger System” Journal of Hydraulic Engineering, Japan Society of Civil Engineering, Vol.68, No.4, 37- 42, 2012.
T. Sumi, S. A. Kantoush, H. Itoh, T. Sase, and T. Satoh, “Experimental Study on Siphon Dredging System at Wonogiri Multipurpose Dam,” Proceeding of Hydropower and Dams, AFRICA , Marrakech, Morocco, 2017.
E. A. Saad, “Impact of Sediment and Sedimentation on Hydropower Generation: Case of Roseires Reservoir” Ph.D. Thesis, UNESCO Chair in Water Resources, Omdurman Islamic University, Sudan, 2017
P. Nilson, and J. Blanton, Impact Evaluation Report-Sudan: Roseires Irrigation Project, World Bank Technical Report Number 3051, 1980, The World bank, Washington, D.C.
A. M. Siyam, “Reservoir Sedimentation Control” Ph.D. Thesis, University of Bristol, England, 2000.
R. Durand, “Basic Relationships of the Transportation of Solids in Pipes: Experimental Research,” Proceedings of the 5th. Congress, IAHR, Minneapolis, 1953.
R. J. Garde, Sediment transport through pipes. Department of Civil Engineering, Colorado Agricultural and Mechanical College, Fort Collins, Colorado, CER No. 0590837, 1956.
V. A. Vanoni, Sedimentation Engineering. ASCE Manual No. 54, ASCE, New York, N.Y., 1975.
E. Condolios, and E. E. Chapus, “Transporting Solid Material in the Pipelines,” Chem. Engineering, 70(6), PP 93-98, Mcgraw-Hill, 1963.
R. Mayerle, C. Nalluri, and P. Novak, “Sediment Transport in Rigid Bed Conveyances,” Journal of Hydraulic Research, Vol. 29, No. 4, April, 1991.
A. A. Ghani, “Sediment Transport in Sewers,” PhD Thesis, University of Newcastle upon Tyne, UK, 1993.
S. Eftekharzadeh, “Sediment Bypass system for Impounding Reservoirs,” PhD Dissertation, Dept. of Civil Eng. and Eng. Mech., University of Arizona, Tucson, Ariz, 1987.
R. H. Hotchkiss, and Xi Haung, “Hydro-suction Sediment-Removal Systems (HSRS): Principles and Field Test,” ASCE Journal, Vol. 121, No. 6, June, 1995.
R. H. Hotchkiss, and F. H. Bollman, “Socio-economic Analysis of Reservoir Sedimentation,” The 27th Congress of the International Association for Hydraulic Research, Energy and power: Sustainable development, San Francisco, California, PP 79-83, Aug. 10-15, 1997.
E. T. Goedde, “To the Critical Velocity of Heterogeneous Hydraulic Transport,” Hydro Transport 5, Vol.2, Hannover, Germany, 1978.
Handbook of Dredging Engineering, Second Edition, McGraw-Hill. J. B. Herbich, New York, 2000.
E. Isa, B. Hossein and S. Ali, “Design criteria for sediment transport in sewers based on self-cleansing concept,” Journal of Zhejiang University SCIENCE A, Volume 15, Issue 11, PP 914–924, November 2014.
N. Vongvisessomjai, T. Tingsanchali, and M. S. Babel, “Non-deposition design criteria for sewers with partfull flow,” Urban Water Journal, 7(1), PP 61–77. 2010
A.M. Siyam, “Optimum Sediment Transport in Pipes with Non-Deposited beds” Nile Water Science& Engineering Journal, Volume 9, Issue 1, PP 1-11, December 2016.
W. H. Graf, “Hydraulics of Sediment Transport,” New York: McGraw-Hill, Inc, 1971.