4/98
SED2D-WES Version 4.3 Beta
throughout the area of interest, producing erroneous results. The boundaries should be sufficiently removed from
the problem area and an attempt should be made to adjust boundary concentrations that are seriously different from
near-equilibrium conditions. This process does not apply to cohesive sediments.
For boundaries at which there is always flow out of the model, for example, a downstream section in a
nontidal river, boundary concentrations can be left unspecified, and the program will calculate the outflowing
concentrations. However, invoking boundary condition buffering for tidal situations is controlled by the variables
IBCFACT and BCFACT on the BC card.
3.6
Description of Output
Output from a model run consists of summaries of input data, computed parameters, and computed
results. Input data summaries include an echo of all card image input data and a tabulation of options and
sediment characteristics that have been chosen. A number of data set codes are output that are of use primarily in
debugging. A listing of program dimensions is provided and data management system banners from input files
(geometry, hydrodynamics, and hotstart data) are printed. These summaries should be carefully reviewed to ensure
that input data were correctly specified and interpreted by the program.
At selected time-steps, some results and some associated parameters are printed for selected elements, if
requested on the TRE card. Standard results output includes suspended sediment concentration in kilograms per
cubic meter at the nodes, flow speed in meters per second; water depth in meters; total bed change in meters from
the start of the run; volume of bed change in cubic meters for the elements; and net bed change (algebraic sum)
and gross bed change (sum of absolute values) in cubic meters over the entire mesh to that point in the run.
A number of specialized output results are available through the trace printout (TR) cards. Most are
detailed listings of the input data or parameters calculated from input data.
4.0
REFERENCES
Ackers, P., and White, W. R. l973 (Nov). "Sediment Transport: New Approach and Analysis, "Journal of the
Hydraulics Division, American Society of Civil Engineers,, No. HYll.
Ariathurai, R.
l974 (Aug).
A Finite Element Model for Sediment Transport in Estuaries, Ph. D. Thesis,
Department of Civil Engineering, University of California, Davis.
Ariathurai, R., MacArthur, R. C., and Krone, R. B. l977 (Oct). "Mathematical Model of Estuarial Sediment
Transport," Technical Report D-77-12, US Army Engineer Waterways Experiment Station, Vicksburg, Miss.
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WORKING DRAFT
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