OPTIMIZATION OF THE CLOSURE OF A BREACHED BARRIER ISLAND IN THE GULF OF MEXICO
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Keywords

optimization closure strategy
sediment loss
turbidity plume
barrier island
Mississippi Coast
MsCIP
Delft3D
UNIBEST

How to Cite

Sokolewicz, M., Walstra, D.-J., Henrotte, J., & Godsey, E. (2014). OPTIMIZATION OF THE CLOSURE OF A BREACHED BARRIER ISLAND IN THE GULF OF MEXICO. Coastal Engineering Proceedings, 1(34), sediment.46. https://doi.org/10.9753/icce.v34.sediment.46

Abstract

A chain of barrier islands in the Gulf of Mexico reduces storm and hurricane impacts along the Mississippi coast. Ship Island, one of the largest islands of this chain, was breached by hurricanes Camille and Katrina creating a 5.5 kilometer wide gap. US Army Corps of Engineers plans to restore the island nourishing 15 million cubic meters of sand. Extensive modeling studies were carried out to support the environmental impact assessment and to optimize design. The main objective of these studies was to determine the impact of the restored island on the environment. The possible increase of sedimentation rates in the adjacent navigation channel connecting a major port to the Gulf of Mexico was of particular interest. The Delft3D models, calibrated on measurements of waves, tidal levels and currents, were used to estimate the annual sediment transport rates. These models were subsequently applied to optimize the design of the closure of Camille Cut. The optimum construction sequence was established. Sediment losses from the fill, and the impact of turbidity plumes on the nearby sea grass fields were determined.
https://doi.org/10.9753/icce.v34.sediment.46
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References

Dean, R.G., 1977. Equilibrium beach proï¬les: U.S. Atlantic and Gulf Coasts, Ocean Engineering Report, 12.University of Delaware, Newark, DE .

Lesser, G.R., Roelvink, J.A., van Kester, J.A.T.M. and Stelling, G.S., 2004. Development and validation of a three-dimensional morphological model. Coastal Engineering 51 (8-9), 883-915. doi:10.1016/ j.coastaleng.2004.07.014.

Ruessink, B.G., Kuriyama, Y., Reniers, A.J.H.M., Roelvink, J.A. and Walstra, D.J.R., 2007. Modeling cross-shore sandbar behavior on the time scale of weeks. J. Geophys. Res., 112, F03010, doi:10.1029/2006JF000730.

USACE, 2009a. Comprehensive Plan and Integrated Programmatic Environmental Impact Statement, Mississippi Coastal Improvements Program (MsCIP) Hancock, Harrison, and Jackson Counties; Comprehensive Plan and Integrated Programmatic Environmental Impact Statement. Volume 1: Main Report, June 2009.

USACE, 2009b. Mississippi Coastal Improvement Program (MsCIP) Hancock, Harrison, and Jackson Counties, Mississippi. Appendix H, Barrier Islands, June 2009.

Van Rijn, L.C., Walstra, D.J.R. and van Ormondt, M., 2007. Unified view of sediment transport by currents and waves. IV: Application of morphodynamic model. Journal of Hydraulic Engineering-ASCE 133 (7).

Walstra, D.J.R., de Vroeg, J.H., van Thiel de Vries, J.S.M., Swinkels, C., Luijendijk, A.P., de Boer, W.P., Hoekstra, R., Hoonhout, B., Henrotte, J., Smolders, T., Dekker, F. and Godsey, E., 2012. A comprehensive sediment budget for the Mississippi barrier islands. Int. Conf. on Coastal Engineering, ASCE, Santander, Spain.

Walstra, D.J.R., A.J.H.M. Reniers, R. Ranasinghe, J.A. Roelvink, B.G. Ruessink, 2012. On bar growth and decay during interannual net offshore migration. Coastal Engineering Vol. 60, pp 190-200, doi: 10.1016/j.coastaleng.2011.10.002

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