Date of Award

Fall 1976

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Ocean & Earth Sciences

Program/Concentration

Oceanography

Committee Director

Peter Fleischer

Committee Member

Ronald E. Johnson

Committee Member

Gary Copeland

Committee Member

Elliot E. Whitehurst

Call Number for Print

Special Collections LD4331.O35R44

Abstract

A channel was dredged in 1965 through the ebb-tidal delta of Lynnhaven Inlet, Virginia. The purpose of this study was to determine if this channel has affected the morphological configuration of the delta. It was proposed that the channel caused the dynamically stable delta to become unstable and change its morphology.

Bathymetric comparisons of seven surveys during the last 122 years, including one conducted during this investigation, show that prior to 1962 and the dredging operations, the delta had become dynamically stable. The present survey shows that the delta has changed its shape in response to the interaction of the channel and the currents moving through the area. Since dredging began, depths over the delta have increased and the delta is shrinking.

Measurements of reversing tidal currents moving through the area indicate that they are great enough to move bottom material and enact the sediment transport. Mean grain-size analysis indicates that the distribution of the sediments in the area is a response to the tidal currents.

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DOI

10.25777/s260-8c23

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