D-R-A-F-T
Obtaining The Velocity Field
The accuracy of SED2D's calculations is dependent on the proper temporal and
spatial estimate of the velocity field. There are two alternatives for specifying the
velocity field.
First, you may estimate some representative behavior from field experience or
statistical analysis for all nodes and for each time interval. The HD-, HU-, and HV-
cards will be used to directly specify the velocity field for the SED2D simulation.
The second, and more accurate method is to supply the binary final results solution
file from RMA2 as the flow field. You must control the starting and ending time of
the RMA2 velocity field (TH card) to be used in the RMA4 simulation. Whenever
the RMA4 selected delta time step does not match the RMA2 hydrodynamic delta
time step, RMA4 will skip over or interpolate (which ever is appropriate) the
RMA2 solution. If the RMA2 solution is shorter than the requested RMA4
simulation, the RMA2 results file will be re-wound and re-used again and again.
Example of hydrodynamic time control, TH card: TCORR=37, TEND=86 hrs.
Sandy Point
2
1.5
1
0.5
0
0
24
48
72
96
120
TIme, Hrs
Marsh Porosity Parameters
Specifying Initial Concentrations
ICP Card
Sediment Time Control
Time Step Control
Using SED2D 35
Users Guide To SED2D-WES
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