Accession Number : AD0770638

Title :   Tidal Currents, Sediment Transport, and Sand Banks in Chesapeake Bay Entrance, Virginia.

Descriptive Note : Technical rept.,


Personal Author(s) : Ludwick,John C.

Report Date : 15 NOV 1973

Pagination or Media Count : 29

Abstract : Taking the mean over all stations in the entrance area, and with reference only to a level 100 cm above the bed, tidal currents at ebb and flood strength are nearly equal in speed and average 42 cm/sec. Taking different individual stations, ebb maximum is 79 cm/sec; flood maximum is 66 cm/sec; however, at more than half the observation stations, maximum flood speed and duration exceed maximum ebb speed and duration. In Chesapeake Bay entrance, a wide entrance of moderate tidal range, net sediment transport at the headlands is directed seaward. Individual shoals within the entrance are bounded on one side by a net sediment transport to seaward and on the other side by a net sediment transport to landward. Ebb deltas and flood deltas occur in alternate succession across the entrance with 4 to 5 of the former and 3 to 4 of the latter. There is also an interior flood delta found where ebb-directed sediment is interdicted and swept landwards in a flood-dominated channel. (Modified author abstract)

Descriptors :   *Ocean currents, *Sediment transport, *Tides, Shallow water, Shores, Deltas, Chesapeake Bay

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE