Study on Settling Efficiency of Sedimentation Basin of Coca Codo Sinclair Hydropower Station in Ecuador

Abstract:

Ecuador is located in South America, and sediment of CCS hydropower station is mainly volcanic ash. This paper makes a study on settling efficiency of sedimentation with the quasi-hydrostatic settlement method and unsaturated sediment discharge method. The result shows that settling efficiency of the two methods are close to each other. Further more, the paper makes a study on settling velocity in different calculation methods, including the method of hydraulic engineering design manual, Zhang Ruijin calculation method and method of the United States Army Corps of Engineers. The settling velocity of volcanic ash under the weak alkaline condition and the influences of temperature on settling velocity are studied by testing. It can provide a reference for design of hydropower station in the surrouding area of South America

• Periodical: Applied Mechanics and Materials (Volume 238)
• Pages: 298-303
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.238.298
• Online since: November 2012
• Authors: Xuan Ying Guo, Song Wei Chen, Dong Po Sun
• Keywords: Quasi-Hydrostatic, Sedimentation Basin, Settling Velocity, Unsaturated Sediment Discharge Method, Volcanic Ash

References

[1] East China Institute of Water Conservancy and Hydroelectric Power, C. Zhang, Hydraulic Engineering Design Manual, Water Resources and Electric Power Press, Beijing, (1984).

[2] Teaching and Research Section of River Sediment Engineering of Wuhan Institute of Hydraulic and Electric Engineering, J. Xie, River Sediment Engineering, Water Resources and Electric Power Press, Beijing, (1983).

[3] Y. Li, J. Yang, J. Zhang, Design of Sand Basin of Water Conservancy and Hydropower Projects, China Water Power Press, Beijing, (2004).

[4] W. H. Graf, E. R. Acaroglu, Settling Velocities of Natural Grains, Bulletin of the International Association of Scientific Hydrology, 4 (1966).

DOI: 10.1080/02626666609493492

[5] W. W. Rubey, Settling velocities of Gravel, Sand, and Silt Particles, American Journal of Science, 25 (1933) 325-338.

DOI: 10.2475/ajs.s5-25.148.325

[6] E. F. Schulz, R. H. Wilde, M. L. Albertson, Influence of Shape on the Fall Velocity of Sedimentary Particles, MRD Sediment Series, 5 (1954).

[7] W. L. Graf, Hydraulics of Sediment Transport, McGraw-Hill, New York, (1971).

[8] E. W. Lane, A. A. Kalinske, Engineering Calculations of Suspended Sediment, Transactions of the American Geophysical Union, (1941).

DOI: 10.1029/tr022i003p00603

[9] V. A. Vanoni, Transportation of Suspended Sediment by Water, Transactions of the ASCE, 111 (1946).

[10] D. B. Simons, F. Senturk, Sediment Transport Technology, Water Resources Publications, Fort Collins, Colorado, (1977).

[11] S. Goldstein, The Steady Flow of Viscous Fluid Past a Fixed Spherical Obstacle at Small Reynolds Number, Proceedings of the Royal Society of London, Series A, 123 (1929).

DOI: 10.1098/rspa.1929.0067

[12] H. Rouse, Fluid Mechanics for Hydraulic Engineers, chapter XI, Dover, New York, (1938).

[13] U. S. Bureau of Reclamation, Design of Small Dams, Denver, Colorado, (1987).

[14] V. A. Vanoni,. Sedimentation Engineering, ASCE Task Committee for the Preparation of the Manual on Sedimentation of the Sedimentation Committee of the Hydraulics Division, ed. 1975, Reprinted (1977).

DOI: 10.1061/jyceaj.0003982

[15] C. T. Yang, Incipient motion and Sediment Transport, Journal of the Hydraulics Division, ASCE, 99 (1973), HY10, Proceeding Paper 10067.

[16] Chih Ted Yang. Sediment Transport Theory and Practice.