Estimation of Bank Erosion Due to Reservoir Operation in Cascade (Case Study: Citarum Cascade Reservoir)
DOI:
https://doi.org/10.5614/itbj.eng.sci.2009.41.2.5Abstract
Sedimentation is such a crucial issue to be noted once the accumulated sediment begins to fill the reservoir dead storage, this will then influence the long-term reservoir operation. The sediment accumulated requires a serious attention for it may influence the storage capacity and other reservoir management of activities. The continuous inflow of sediment to the reservoir will decrease the capacity of reservoir storage, the reservoir value in use, and the useful age of reservoir. Because of that, the rate of the sediment needs to be delayed as possible. In this research, the delay of the sediment rate is considered based on the rate of flow of landslide of the reservoir slope. The rate of flow of the sliding slope can be minimized by way of each reservoir autonomous efforts. This effort can be performed through; the regulation of fluctuating rate of reservoir surface current that does not cause suddenly drawdown and upraising as well. The research model is compiled using the searching technique of Non Linear Programming (NLP). The rate of bank erosion for the reservoir variates from 0.0009 to 0.0048 MCM/year, which is no sigrificant value to threaten the life time of reservoir.Mean while the rate of watershed sediment has a significant value, i.e: 3,02 MCM/year for Saguling that causes to fullfill the storage capacity in 40 next years (from years 2008).
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References
Sloff, J.C., Reservoir Sedimentation, Communications on Hydraulic and Geotechnical Engineering Report, 91-2, Faculty of Civil Engineering Delft University of Technology, 1991. 166 Sri Legowo, Iwan K. Hadihardaja & Azmeri
Wurbs, A.R., Modelling and Analysis of Reservoir System Operations, Prentice Hall PTR, Upper Saddle River NJ 07458, 1996.
Hadihardaja, I.K., Modelling of Reservoir Operation with Sedimentation Control, Dissertation for Degree of Doctor of Philosophy Colorado State University, 2000.
Abramson W.L., et al., Slope Stability and Stabilization Methods, A Wiley-Interscience Publication, John Wiley and Sons, Inc, Canada, 1996.
Das, M.B., Endah, N. & Mochtar, B.I., Mekanika Tanah: Prinsip-prinsip Rekayasa Geoteknik, (Soil Mechanics Principles in Geotechnical Engineering), Erlangga Press, 1985.
PJT II, Waduk Djuanda Kumpulan Data Kebutuhan Air Tahun 1988 s/d 1991, Tahun 1993 s/d 2001, dan Tahun 2003 s/d 2005 (Djuanda Reservoir, collective data of water demand in year 1988 to 1991, in year 1993 to 2001 and in year 2003 to 2005), 2006.
Garde, R.J. & Ranga Raju, K.G., Mechanics of Sediment Transportation and Alluvial Stream Problems, Wiley Eastern Limited, New Delhi, 1977.
VenTe Chow, Open Channel Hydraulics, Mc Graw-Hill. LTD, 1980.
Azmeri, Trade-Off Modeling for Cascade Reservoir Operation Using Genetic Algorithm, Dissertation for degree of doctor of ITB, 2008.