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J. Mar. Sci. Eng. 2015, 3(4), 1474-1503; doi:10.3390/jmse3041474

Wave and Hydrodynamic Modeling for Engineering Design of Jetties at Tangier Island in Chesapeake Bay, USA

Coastal and Hydraulics Laboratory, U.S. Army Engineer Research and Development Center, 3909 Halls Ferry Road, Vicksburg, MS 39180, USA
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Author to whom correspondence should be addressed.
Academic Editor: Gerben Ruessink
Received: 8 September 2015 / Revised: 2 November 2015 / Accepted: 17 November 2015 / Published: 1 December 2015
(This article belongs to the Special Issue Coastal Morphodynamics)

Abstract

The protection of a boat canal at the western entrance of Tangier Island, Virginia, located in the lower Chesapeake Bay, is investigated using different structural alternatives. The existing entrance channel is oriented 45 deg with respect to the local shoreline, and exposed directly to the lower Bay without any protection. The adjacent shoreline has experienced progressive erosion in recent decades by flooding due to severe storms and waves. To protect the western entrance of the channel and shoreline, five different jetty and spur combinations were proposed to reduce wave energy in the lee of jetties. Environmental forces affecting the proposed jettied inlet system are quantified using the Coastal Modeling System, consisting of a spectral wave model and a depth-averaged circulation model with sediment transport calculations. Numerical simulations were conducted for design wave conditions and a 50-year return period tropical storm at the project site. Model results show a low crested jetty of 170-m length connecting to the north shore at a 45-deg angle, and a short south spur of 25-m long, provide adequate wave-reduction benefits among the five proposed alternatives. The model simulation indicates this alternative has the minimum impact on sedimentation around the structured inlet and boat canal. View Full-Text
Keywords: coastal modeling; jetty design; Tangier Island; Chesapeake Bay coastal modeling; jetty design; Tangier Island; Chesapeake Bay
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lin, L.; Demirbilek, Z.; Ward, D.; King, D. Wave and Hydrodynamic Modeling for Engineering Design of Jetties at Tangier Island in Chesapeake Bay, USA. J. Mar. Sci. Eng. 2015, 3, 1474-1503.

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