DYNHYD5

Short Summary Long Abstract	DYNHYD5 solves the one-dimensional shallow-water equations of continuity and momentum for a branching or channel-junction (link-node) computational network. The model is capable of handling variable tidal cycles, wind, and unsteady inflows. The model assumes that Coriolis and other accelerations normal to the direction of flow are negligible, that channels can be adequately represented by rectangular geometry, and that bottom slopes are moderate. Most natural flow conditions in large rivers and estuaries would be acceptable; small streams or rivers with a large bottom slope cannot be simulated. Simulations typically proceed at 1 to 5 minute intervals. The resulting unsteady hydrodynamics are averaged over larger time intervals and stored for later use by the water quality model WASP5.
Status	The FORTRAN model code is not proprietary. The source code and DOS executable is distributed with the WASP package of models. A mailing list is available.
Graphical User Interface	A Windows 95 version of DYNHYD5, WIN/DYNHYD+, includes a includes an input preprocessor for developing input datasets and a graphical post processor for reviewing model results (AScI Corporation).
Pre-processors	An interactive, menu driven user environment (WISP) that allows the user to view/edit input data files on a DOS system is distributed with the WASP models. PREDYN, a DYNHYD5 pre-processor is also distributed with the WASP models. Sample input files are distributed with the program.
Post-processors	WISP (distributed with the WASP models) allows the user to execute post processor programs on a DOS system. A tabular and graphical post-processor are included with the WASP models.
Developer	US Environmental Protection Agency (EPA)
Contact	Model Distribution Coordinator, Center for Exposure Assessment Modeling, Environmental Protection Agency, Athens, Georgia, 706-355-8400, electronic mail: ceam@epamail.epa.gov
Users' Manual	Ambrose, R.B., Wool, T.A., and Martin, J.L., 1993: The Dynamic Estuary Model Hydrodynamics Program, DYNHYD5, Model Documentation and User Manual, US Environmental Protection Agency, Env. Research Lab., Athens Georgia. The User's Manual is distributed with the software.
Project Abstracts	Appoquinimink River, DE

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