Abstract
Density contrasts between the water of Choctawhatchee Bay and the Gulf of Mexico result in sharp vertical and horizontal stratification in the northern part of East Pass near Destin, Fla., during flood and a portion of the ebb tidal phases. As a consequence of this stratification, flood tide currents are swiftest and of longest duration in the deeper layers within dredged channels. Ebb currents attain their velocity and duration maxima in the upper layers of the water column. Accordingly, bed form asymmetries indicate that bedload transport is flood dominated in the channels and ebb dominated over shoals. Vertical density homogeneity resulting from greater mixing in the seaward reaches and at the mouth of the inlet channel is accompanied by bidirectional sand transport.
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