Chapter
Dec 31, 2015
Case Studies of Delaware’s Tidal Inlets: Roosevelt and Indian River Inlets
Authors: W. A. Dennis, G. A. Lanan, and R. A. DalrympleAuthor Affiliations
Publication: Coastal Engineering 1978
Abstract
Studies were undertaken to document the past and present characteristics and trends of Delaware’s two major tidal inlets, Roosevelt and Indian River Inlets.
It was found that both inlet complexes are effective sediment traps causing considerable downdrift erosion. The major mechanism by which sand enters Indian River Inlet is by overtopping the impounded south jetty. At Roosevelt Inlet sediments are readily transported past the severed steel sheet pile jetties.
The results of a one-dimensional hydraulic model, as well as field measurements, predict the presence of a mean southerly flow through the canal and bay system which connects these two inlets. This flow is shown to have a substantial effect on the behavior and stability of these entranceways, causing major assymmetries on the depositional patterns at each location. Roosevelt Inlet was found to have a strong tendency to trap sediment within its throat; whereas, Indian River Inlet, on the opposite end of the system, was found to retain large quantities of sand on its developing ebb tidal shoal.
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Published In
Coastal Engineering 1978
Pages: 1282 - 1301
Copyright
© 1978 American Society of Civil Engineers.
History
Published online: Dec 31, 2015
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Authors
Affiliations
W. A. Dennis
Wilmington District, U. S. Army Corps of Engineers, Wilmington, NC.
G. A. Lanan
Texas Eastern Transmission Company, Houston, TX.
R. A. Dalrymple
Department of Civil Engineering, and College of Marine Studies, University of Delaware, Newark, DE.
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