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Beneficial Uses
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Engineered Uses
 Black Dot Image Beach Nourishment
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Beach Nourishment

    Description
    The influences of waves and tidal currents keep beach material in continuous motion. Where the prevailing wave direction is at an angle to the beach of less than 90 deg, some material will be moved along the beach or foreshore or even offshore in a process called littoral transport. This movement is most rapid under storm conditions. If the moved material is not replaced, the beach and eventually the shoreline will erode. If lost beach material is not replaced naturally, beach nourishment may be necessary to enhance the beach profile and moderate the wave climate at the shoreline. In addition to the improvement of beaches for coast protection, improvement may also be required for recreation beaches. Recreation beaches may be improved or new beaches may be created. Dredging can supply the required large quantities of sand and gravel-sized material for beach nourishment. A life span of 10 years is a common design target for many beach nourishment schemes but a shorter life may be acceptable, particularly where the cost of nourishment material is low.

    Recommended Sediment Types

    • Gravel and sand

    References

    • Francingues, N.R. McLellan, T.N., Hopman, R.J. Vann, R.G., and Woodward, T.D. (2000.) "Innovations in dredging technology: equipment, operations and management," DOER Technical Notes Collection (ERDC TN-DOER-T1), U.S. Army Research and Development Center.

    • National Oceanic Atmospheric Administration (2000.) "State, Territory, and Commonwealth Beach Nourishment Programs: A National Overview," Office of Ocean & Coastal Resource Management Program Series Technical Document No. 00-01, Washington, DC.

    • Nelson, D. A., and Pullen, E. J. (1990.) "Environmental Considerations in Using Beach Nourishment for Dredged Material Placement," pp. 113-128. In: R. L. Lazor and R. Medina (eds.) Beneficial Uses of Dredged Material. Technical Report D-90-3, U.S. Army Engineer Research Waterways Experiment Station, Vicksburg, MS.

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