Production of topographic vorticity by vortex stretching and bottom friction in circularly rotating currents in shallow tidal areas is studied as a function of topographic length scale. It is shown that vorticity is transferred from the oscillating field to the mean (residual) field and to higher harmonics (the overtides). For a given slope in the bottom topography the transfer is largest for a topographic wave length of the order of the tidal displacement amplitude....
Zimmerman, J. T.. 1980. "Vorticity transfer by tidal currents over an irregular topography." Journal of Marine Research 38, (4). https://elischolar.library.yale.edu/journal_of_marine_research/1521