Karnafuli Project, Model Studies of Spillway Damage
Publication: Journal of Hydraulic Engineering
Volume 114, Issue 5
Abstract
In 1961, the spillway chute of the Karnafuli Hydroelectric Project was damaged by flows ranging up to 3,480 cms (123,000 cfs), about 20% of the design discharge. While not involved with the project prior to the damage, the St. Anthony Falls Hydraulic Laboratory was authorized to conduct model studies of the spillway. It is the objective of this paper to illustrate the damage to the Karnafuli spillway, present information on the probable cause of the damage, and make brief recommendations concerning pressure fluctuations in stilling basins. A separate paper (Toso and Bowers 1988) provides information on a recent study of extreme pressures in stilling basins. The model studies indicated that fluctuating pressures in the hydraulic jump, with magnitudes up to 11 m (36 ft) of head, could have entered the 0.3‐m (12‐in.) drain lines in the chute blocks and caused uplift of the chute slab.
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References
1.
Bowers, C. E. (1964). “Karnafuli hydroelectric project, hydraulic studies of spillway.” St. Anthony Falls Hydraulic Laboratory Film No. 74, St. Anthony Falls Hydraulic Laboratory, University of Minnesota, St. Paul, Minn.
2.
Bowers, C. E., and Toso, J. W. (1985). “Karnafuli hydroelectric project; hydraulic model studies of spillway damage.” Proc. ASCE Hydraulics Division Specialty Conf., Lake Buena Vista, Fla., 1,136–1,141.
3.
Schiebe, F. (1971). “The stochastic characteristics of pressure fluctuations on a channel bed due to turbulence in a hydraulic jump,” thesis presented to the University of Minnesota, at Minneapolis, Minn., in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
4.
Schiebe, F., and Bowers C. E. (1971). “Boundary pressure fluctuations due to macroturbulence in the hydraulic jump.” Proc. of Symposium on Turbulence in Liquids, University of Missouri, Columbia, Mo.
5.
Toso, J. W. (1986). “The magnitude and extent of extreme pressure fluctuations in the hydraulic jump,” thesis presented to the University of Minnesota, at Minneapolis, Minn., in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
6.
Toso, J. W., and Bowers, C. E. (1985). “Data acquisition and analysis of pressure fluctuations in the hydraulic jump.” Proc. of ASCE Hydraulics Division Specialty Conf., Lake Buena Vista, Fla.
7.
Toso, J. W., and Bowers, C. E. (1988). “Extreme pressures in hydraulic jump stilling basins.” J. Hydr. Engrg. (in press).
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 114 • Issue 5 • May 1988
Pages: 469 - 483
Copyright
Copyright © 1988 ASCE.
History
Published online: May 1, 1988
Published in print: May 1988
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