Verification of the Hydrodynamic and Sediment Transport Hybrid Modeling System for Cumberland Sound and Kings Bay Navigation Channel, Georgia

• Main Authors: Granat, Mitchell A., Brogdon, Noble J., Cartwright, John T., McAnally, William H. Jr.
• Other Authors: Naval Submarine Base (Kings Bay, Ga.), United States. Naval Facilities Engineering Command.
• Format: Report
• Language: English
• Published: U.S. Army Engineer Research and Development Center (ERDC) 1989
• Subjects: Ingenieurwissenschaften (620); Cumberland Sound; Hydrodynamics; Kings Bay; Georgia; Marsh-estuarine circulation; Marshes; Estuaries; Estuary; Sediment transport; Sedimentation; Deposition; Trident
• Online Access: https://hdl.handle.net/20.500.11970/111873

Source: https://erdc-library.erdc.dren.mil/jspui/ A hybrid modeling system (coupled physica and numerical models) was developed to investigate the hydrodynamic and sedimentation processes of Cumberland Sound and the interior Kings Bay navigation channel. The hybrid modeling procedures and the physical and numerical model verifications are described in detail. The Kings Bay physical model was an accurately scaled fixed-bed concrete model of the Cumberland Sound/Kings Bay estuarine system, The physical model provided the means of assessing three-dimensional hydrodynamic characteristics of Cumberlaqd Sound and Kings Bay. It also provided the boundary forcing conditions for the numerical model and an expanded data base for comparison. Verification of the physical model to reproduce pre-Trident channel field measurements collected during November 1982 and transitional channel conditions measured during January 1985 was demonstrated The other component of the modeling system was the US Amy Corps of Engineers Generalized Computer Program System: Open-Channel Flow and Sedimentation, TABS-2. TABS-2 is a complete depth-averaged finite element numerical modeling system. The numerical hydrodynamic model RMA-2V used physical model-derived St, Marys Inlet water levels and tributary velocity measurements for the boundary forcing conditions for an average tidal cycle. The numerical model was verified to physical model tidal elevations and depth-averaged velocity data for interior locations. A wetting and drying algorithm was used to numerically model the extensive marsh and intertidal areas of the estuarine system. Marsh-estuarine circulation interaction and prescribed marsh elevation were found to be important in achieving proper hydrodynamic reproduction, Three separate numerical model schematizations or meshes of the Cumberland Sound system were verified as the submarine channel evolved in detail. RMA-2V demonstrated reasonable reproduction of pre-Trident and transitional channel hydrodynamic conditions for the Cumberland ...