Coastal Sediment Transport & Morphology Modeling with SMS


Application:Coastal Modeling
Developer:U.S. Army Corp of Engineers


SMS provides a custom interface to the GENCADE model offering a simple way to set model parameters and a graphical user interface to run the model and visualize the results. Gather background data from a variety of sources from GIS to CAD and access online data from numerous databases of maps, images, and elevation data. SMS allows you to interact with models in true 3D taking advantage of optimized OpenGL graphics and to create photo-realistic renderings and animations for PowerPoint, print, and web presentations.

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GENCADE Description:
GenCade simulates shoreline change relative to regional morphologic constraints upon which these processes take place. The evolution of multiple interacting coastal projects and morphologic features and pathways, such as those associated with inlets and adjacent beaches may also be simulated. The model supports responses to imposed wave conditions, coastal structures, and other engineering activity (e.g., beach nourishment).

Typical longshore extents and time periods of modeled projects can be in the ranges of one to 100 km and one month to multiple decades, respectively, and almost arbitrary numbers and combinations of groins, detached breakwaters, seawalls, jetties, and beach fills can be represented. GenCade simulates shoreline change produced by spatial and temporal differences in longshore sand transport. Shoreline movement such as that produced by beach fills and river sediment discharges can also be represented. The main utility of the modeling system lies in simulating the response of the shoreline to structures sited in the nearshore. Shoreline change produced by cross-shore sediment transport as associated with storms and seasonal variations in wave climate cannot be simulated; support of cross-shore processes are being considered for future versions of the model.

Capabilities of GenCade:

  • Almost arbitrary numbers and combinations for groins, jetties, detached breakwaters, beach fills, and seawalls
  • Compound structures such as T-shaped, Y-shaped, and spur groins
  • Bypassing of sand around and transmission through groins and jetties
  • Diffraction at detached breakwaters, jetties, and groins
  • Coverage of wide spatial extent
  • Offshore input waves of arbitrary height, period, and direction
  • Multiple wave trains (as from independent wave generation sources)
  • Sand transport due to oblique wave incidence and longshore gradient in height
  • Wave transmission at detached breakwaters