employs sophisticated techniques that allow concentration of grid cells in
regions of interest or where geographic features are irregular, and wider
spacing of grid cells in areas where conditions do not change rapidly.
Grid
generation tools for models such as CLHYD and HARBD are in a developmental
stage and will be released in late FY92.
The post-processing package includes graphics to plot model output for
comparison and analysis purposes.
Four basic types of plots are available:
time-histories of a scalar variable or vector magnitude and direction at
selected grid points; vector maps or "snapshots" at a given instant in time;
wave ray plots; and profile plots that show the spatial variation of a model
variable at an instant in time. Software for producing contour plots is
presently under development.
The utility software package presently contains two programs: a program
to determine tidal constituents from a time history of tidal elevations; and a
program to generate a time series of water elevations from tidal constituent
input.
Generally, CMS users are not required to learn the JCL of the host
computer system. Most of the job'control commands normally required to submit
models and data files to the host computer for execution are accomplished by
the CMS procedure files.
However, users must be able to use an editor on the
supercomputer or be able to transfer files from their local computing
environment to the supercomputer.
SUPPORT:
Services and products provided to Corps users include: training
w o r k s h o p s , consulting services, and a CMS user's manual.
Training Corps
personnel on the usage of the CMS, and specific models contained within CMS,
is accomplished via periodic workshops.
Currently, CERC provides limited
consultation services to Corps personnel performing model applications via the
Numerical Modeling Maintenance Fund. More intensive training can be provided
as part of joint field applications between CERC and Corps elements.
Experience at CERC indicates that applying these models requires a significant
commitment of resources (e.g., time and manpower) to understand the
complexities and intricacies of numerical modeling.
Individual models and major software packages are documented in separate
chapters in the CMS user's manual.
Each model and package residing in the CMS
is documented so that new or infrequent users can readily apply a model. This
manual is in an unbound format to permit efficient and cost-effective updates
and additions. Manual contents include discussions of model capabilities,
theory, and application.
Example-problems illustrating model capabilities are
also contained in these manuals.
A V A I L A B I L I T Y : Most efforts involving the use of models in the CMS are both
and
computationally-intensive, and require the use of large mainframe
computers for their efficient execution. The CMS is'installed, maintained,
and supported on the U.S. Army Waterways Experiment Station's Cray Y-MP
supercomputer.
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