TECHNICAL PAPERS
Sep 1, 1986

Engineering Model for Well‐Mixed Tidal Basin

Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 112, Issue 5

Abstract

A simple representation for a tidal basin with freshwater input is described. By assuming the conditions are well‐mixed within the basin, it is possible to develop an elementary analysis for predicting salinities in the basin and sediment transport between the estuary and the basin due to density exchange flow. The results of the analysis are presented in a generalized manner and this enables first estimates for some prototype situations to be made easily and with a minimal amount of field data. Some very simple physical model tests, described in the paper, have confirmed the validity of the analysis. An example of the use of the engineering model is given in which the dredging requirement at a small dock system is examined; this reveals some interesting and important features, and it is likely that these features apply at other tidal basins.

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References

1.
Allen, F. H., and Price, W. A. (1959). “Density Currents and Siltation in Docks and Tidal Basins.” Dock and Harbour Authority, July, pp. 72–76.
2.
Halliwell, A. R., and O'Dell, M. (1970). “Density Currents and Turbulent Diffusion in Locks.” Proc., Twelfth Coastal Engrg. Conf., Washington, D.C., pp. 1959–1977.
3.
Halliwell, A. R., and O'Connor, B. A. (1974). “Quantifying Spoil Disposal Practices.” Proc., Fourteenth Conf. on Coastal Engrg., Copenhagen, pp. 2581–2600.
4.
Keulegan, G. H. (1957). “An Experimental Study of the Motion of Saline Water from Locks and Fresh Water Channels.” Report No. 5168. U.S. Dept. of Commerce, National Bureau of Standards.
5.
Schijf, J. B., and Schönfeld, J. C. (1953). “Theoretical Considerations of the Motion of Salt and Fresh Water.” Proc., Minnesota International Hydraulics Convention, pp. 321–333.
6.
Schultz, E. A., and Simmons, H. B. (1957). “Freshwater‐Saltwater Density Currents. A. Major Cause of Siltation in Estuaries.” Tech. Bull. No. 2. U.S. Army Corps of Engrs.
7.
Wilkie, M. J. (1975). “Measurement of Salinity in Hydraulic Models.” Tech. Mem. 1/1975. Hydraulics Research Station, Wallingford, England.

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Go to Journal of Waterway, Port, Coastal, and Ocean Engineering
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 112Issue 5September 1986
Pages: 572 - 590

History

Published online: Sep 1, 1986
Published in print: Sep 1986

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Authors

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A. Roy Halliwell
Prof. of Civ. Engrg., Heriot‐Watt Univ., Edinburgh EH14 4AS, Scotland, U.K.

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