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8 - Interactions among Tides, Density Gradients, and Wind

Published online by Cambridge University Press:  24 February 2022

Arnoldo Valle-Levinson
Arnoldo Valle-Levinson
Affiliation:
University of Florida
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Summary

This chapter considers interactions between different forcings. It first describes the interaction between tidal currents and density gradients at intratidal (within one tidal cycle) time scales. One outcome of this interaction is the phenomenon known as tidal straining. The chapter continues with the treatment of intratidal variations of density that can also result from the interaction of density fields with tides and bathymetry. Subsequently, the chapter presents a description of the interaction between tides and density gradients at subtidal time scales, that is, at periods greater than one tidal cycle. The chapter then describes how advective accelerations from tidal currents can interact with density gradients to modify residual flows. It follows with a description of the competition between tidal stresses and density gradients in driving residual flows. It then deals with the competition between density gradients and wind stresses, to later add tidal forcing. The chapter then includes the influence of river discharge on estuarine circulation. The last two subsections present salt (or solute) budgets and their linkage to hydrodynamics and approaches to study saltwater intrusion

Keywords

tidal strainingwind strainingadvective accelerationsRossby numberFroude numberWedderburn number
Type
Chapter
Information
Introduction to Estuarine Hydrodynamics , pp. 124 - 154
Publisher: Cambridge University Press
Print publication year: 2022

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References

Additional Sources

Burchard, H., and Hofmeister, R. (2008) A dynamic equation for the potential energy anomaly for analysing mixing and stratification in estuaries and coastal seas. Estuarine Coastal and Shelf Science 77: 679–687.CrossRefGoogle Scholar
de Boer, G.J., Pietrzak, J.D., and Winterwerp, J.C. (2008) Using the potential energy anomaly equation to investigate tidal straining and advection of stratification in a region of freshwater influence. Ocean Modelling 22: 1–11.CrossRefGoogle Scholar
Geyer, W.R., and MacCready, P. (2014) The estuarine circulation. Ann. Rev. Fluid Mech. 46(1): 175–197.CrossRefGoogle Scholar
Lerczak, J.A., Geyer, W.R., and Chant, R.J. (2006) Mechanisms driving the time-dependent salt flux in a partially stratified estuary. J. Phys. Ocean. 36(12): 2296–2311.CrossRefGoogle Scholar
Lerczak, J.A., Geyer, W.R., and Ralston, D.K. (2009) The temporal response of the length of a partially stratified estuary to changes in river flow and tidal amplitude. J. Phys. Ocean. 39(4): 915–933.CrossRefGoogle ScholarPubMed
MacCready, P. (1999) Estuarine adjustment to changes in river flow and tidal mixing. J. Phys. Ocean. 29: 708–726.2.0.CO;2>CrossRefGoogle Scholar
MacCready, P. (2007) Estuarine adjustment. J. Phys. Ocean. 37: 2133–2145.CrossRefGoogle Scholar
Monismith, S.G., Kimmerer, W., Burau, J.R., and Stacey, M.T. (2002) Structure and flow-induced variability of the subtidal salinity field in northern San Francisco Bay. J. Phys. Ocean. 32: 3003–3019.2.0.CO;2>CrossRefGoogle Scholar
Scully, M.E., Friedrichs, C., and Brubaker, J. (2005) Control of estuarine stratification and mixing by wind-induced straining of the estuarine density field. Estuaries 28(3): 321–326.CrossRefGoogle Scholar
Scully, M.E., Geyer, W.R., and Lerczak, J.A. (2009) The influence of lateral advection on the residual estuarine circulation: A numerical modeling study of the Hudson River Estuary. J. Phys. Ocean. 39(1): 107–124.CrossRefGoogle Scholar
Simpson, J.H., Brown, J., Matthews, J., and Allen, G. (1990) Tidal straining, density currents, and stirring in the control of estuarine stratification. Estuaries 13(2): 125–132.CrossRefGoogle Scholar

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