. DMS : Diagnostic Modeling System. Inlets; Dredging; Sedimentation and deposition. Figure 18. Example of contours of sediment transport Example Application - East Pass Inlet Shoal classification at East Pass Inlet with the DMS-Manual prompted investigation of the physical processes with two types of models that will become available in the DMS-Analytical Toolbox. First, a hydrodynamic model determines the magnitude and direction of the inlet's currents. Second, a wave- refraction model characterizes the wave climate in the inlet throat. Inlet hydrodynamics As identified in Chapter 1, the main
. DMS : Diagnostic Modeling System. Inlets; Dredging; Sedimentation and deposition. Figure 18. Example of contours of sediment transport Example Application - East Pass Inlet Shoal classification at East Pass Inlet with the DMS-Manual prompted investigation of the physical processes with two types of models that will become available in the DMS-Analytical Toolbox. First, a hydrodynamic model determines the magnitude and direction of the inlet's currents. Second, a wave- refraction model characterizes the wave climate in the inlet throat. Inlet hydrodynamics As identified in Chapter 1, the maintained channels at East Pass Inlet contain three channel shoaling hot spots (Figure 5). For two of the areas (Channel Bend and Old Pass), the application of the DMS-Manual in Chapter 3 gave more than one classification of shoal type. For both these areas, the physical processes involved currents through the pass. This prompted the need to investigate the inlet hydrodynamics. This section details the application of RMA2 (Thomas and McAnally 1985) to resolve the current patterns at the shoaling areas. RMA2, a 2-D, depth-averaged, finite-element, hydrodynamic numerical model, computes water-surface elevation and horizontal velocities for subcritical, free-surface flows. The program computes a finite-element solution to the Reynold's form of the Navier-Stokes equations. Figure 19 depicts the bathymetry input to RMA2. The constructed bathymetry reflects a combination of the following hydrographic surveys, which characterize the area given in parentheses: • 1997 US ACE SHOALS Lidar Survey (Inlet Vicinity) • 1996 US ACE SHOALS Lidar Survey (Inlet Vicinity) • 1987 NOAA Nautical Chart #11385 (Choctawhatchee Bay) • 1995 NOAA Nautical Chart #11388 (Gulf of Mexico) 38 Chapter 4 DMS-Analytical Toolbox. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not p
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