St. Marys Inlet is the main ocean entrance to the Naval Submarine Base, Kings Bay, Georgia. In order to accommodate Trident submarines at the base, it became necessary to modify the exterior navigation channel. This report describes details of a numerical modeling effort performed to study the effects of channel modifications on coastal processes near the inlet, especially channel shoaling rates. A system of numerical models, which included models for tides, waves, wave-induced currents, and noncohesive sediment (sand) transport, was used in the study. The system, together with two computational grids, was called Model B. It was used to study existing (base) as well as planned conditions. Plan 1 is to widen the navigation channel by 100 ft, deepen the channel to -49 ft mlw (46-ft project depth plus 3-ft advance maintenance), and extend the channel on the ocean side with a 20-deg bend to the south. Model B considered the simultaneous sand-tightening of a 1,000-ft segment of the south jetty. The tidal model was verified using field data taken on 10 November 1982. The average year's wave climate for the study area was obtained from 20-year hindcast data. The dataset included normal storms (but not hurricanes and tropical storms). It was used in running the wave and wave induced current models. The sediment transport model determined noncohesive sediment (sand) transport in the study area under the action of tides, waves and wave-induced currents. It considered a mean tide and the average year's wave climate. It was verified by comparing computed erosion/deposition rates in the navigation channel with those obtained from field surveys taken during 1980-81. There was good agreement both with respect to trends and magnitudes. While all four models were run for base conditions, only the tidal model and the sediment transport model were run for Plan 1 conditions to meet the urgent need for model results. Based on the model results and available information, recommendations on advance maintenance dredging are made for various reaches of the navigation channel.


    Access

    Download


    Export, share and cite



    Title :

    Kings Bay Coastal Processes Numerical Model



    Published in:

    Technical Report ; TR-CERC-88-3


    Publication date :

    1988


    Size :

    5416937


    Type of media :

    Report


    Type of material :

    Electronic Resource


    Language :

    English



    Classification :


    Coastal processes

    Fairbridge, R. W. | NTRS | 1965


    Kings Bay Coastal and Estuarine Physical Monitoring and Evaluation Program: coastal studies. Volume 2, Appendices B-G

    Kraus, Nicholas C. / Gorman, Laurel Therese / Pope, Joan | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 1995

    Free access

    Coastal and Inlet Processes Numerical Modeling System for Oregon Inlet, North Carolina

    Vemulakonda, S. Rao / Swain, Abhimanyu / Houston, James Robert et al. | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 1985

    Free access

    Kings Bay Coastal and Estuarine Physical Monitoring and Evaluation Program: Coastal Studies. Volume 1, Main Text and Appendix A

    Kraus, Nicholas C. / Gorman, Laurel Therese / Pope, Joan | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 1994

    Free access

    Regional Coastal Processes Numerical Modeling System: Report 1, RCPWAVE - A linear Wave Propagation Model for engineering Use

    Ebersole, Bruce A. / Cialone, Mary A. / Prater, Mark D. | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 1986

    Free access