On the vertical structure of tidal currents in shallow water near the Changjiang River estuary

Li Shenduo

doi:10.1007/BF02848519

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On the vertical structure of tidal currents in shallow water near the Changjiang River estuary

Updated：2023-05-16

- On the vertical structure of tidal currents in shallow water near the Changjiang River estuary
- Journal of Oceanology and Limnology Vol. 5, Issue 1, Pages: 22-33(1987)
- Affiliations：
  
  Institute of Estuarine and Coastal Research
- Author bio：
- Funds：
- DOI：10.1007/BF02848519
  CLC：
- Published：1987
- Accepted：
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Shenduo, L. On the vertical structure of tidal currents in shallow water near the Changjiang River estuary., Chin. J. Ocean. Limnol. 5, 22–33 (1987). https://doi.org/10.1007/BF02848519
DOI：

Shenduo, L. On the vertical structure of tidal currents in shallow water near the Changjiang River estuary., Chin. J. Ocean. Limnol. 5, 22–33 (1987). https://doi.org/10.1007/BF02848519 DOI：

摘要

Abstract

This research on the vertical structure of tidal current in shallow water near the Changjiang River estuary is based on a great deal of observation data of current obtained recently

and a simple mathematic model. The essential features of the structure are: (1) the maximum velocity decreases with depth

the shallower the water

the lower the velocity; (2) the orientation of maximum velocity continuously deviates from the surface to the bottom to the left at the western side of the mouth bar and to the right at the eastern side; (3) the time of maximum velocity leads steadily with depth; (4) in general

tidal currents rotate clockwise

the nearer the sea-bed

the narrower the ellipse of the tidal current; (5) the ratioW 1/W2 varies non-linearly with depth

and is smaller in the middle layer than at the surface and bottom. Bottom friction is the main cause of the vertical structure.

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Keywords

references

Bowden, K. F., L. A. Fairbairn and P. Hughes, 1959. The distribution of shearing stresses in a tidal current.Geophys. J. R. Astr. Soc. 2: 288–305.

Fang Guohong, 1981. Quasi-harmonic constituent method for analysis and prediction of tides. III. A practical procedure for analysing tidal streams and tidal elevations.Studia Marina Sinica 18:19–40. (in Chinese with English abstract)

Fang, G. and T. Ichiye, 1983, On the vertical structure of tidal current in a homogeneous sea.Geophys. J. R. Astr. Soc. 73: 65–82.

Godin, G., 1972. The Analysis of Tidal. University of Toronto Press. pp. 147–148.

Johns, B., 1966. On the vertical structure of tidal flow in river estuaries.Geophys. J. R. Astr. Soc. 12: 103–110.

Kundu, P. K., J. O. Blanton, and M. M. Janopaul, 1981. Analysis of current observation on the Georgia shelf.J. Phys. Oceanogr. 11: 1139–1149.

Proudman, J., 1953. Dynamical Oceanography. Methuen, London. PP. 310–315.

Swift, M. R., R. Reichard and B. Celikkol, 1979. Stress and tidal current in a well-mixed estuary.J. Hydraul. Div. ASCE 105(HY7): 785–799.

Taylor, G.I., 1919. Tidal friction in the Irish Sea.Phil. Trans. Roy. Soc. London.A220: 1–93.

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