WASP5

Short Summary Long Abstract	Water Quality Analysis Simulation Program (WASP) is a generalized framework for modeling contaminant fate and transport in surface waters. WASP is based on the flexible compartment modeling approach, and can be applied in one, two, or three dimensions. Each compartment, or segment, is designated as a hypolimnion layer, epilimnion layer, upper benthic layer, or lower benthic layer. The size of the segments are determined by the spatial and temporal scale of the problem being analyzed. WASP5 includes two submodels for water quality/eutrophication and toxics, referred to as EUTRO5 and TOXI5, respectively. EUTRO5 can be operated by the user at various levels of complexity to simulate some or all of nutrients, phytoplankton, carbonaceous material, and dissolved oxygen and the interactions between these variables and with the benthos. In TOXI5, the transport of up to three user-defined types of sediment can be simulated. Because sediment deposition and erosion are not functions of sediment shear strength and water column shear stress, the sediment transport model should be considered descriptive. TOXI5 also simulates the transport and transformation of one to three chemicals that may be independent or they may be linked with reaction yields, such as a parent compound-daughter product sequence. WASP5 explicitly handles most of the physical, chemical, and biological processes that affect synthetic organic compounds, excluding reduction and precipitation-dissolution. If the kinetics of these reactions are described by the user, they also can be included as an extra reaction. The flows that determine advective transport can be supplied directly, or calculated by a hydrodynamic model. The easiest linkage is with a link-node model running on an equivalent spatial network. Flows and volumes predicted by the link-node hydrodynamic model DYNHYD5, which is provided with the WASP5 package, can be read and used by WASP. Multi-dimensional models have also been linked to WASP5.
Water Quality Constituents Modeled	temperature salinity coliform bacteria nitrogen biochemical oxygen demand algae phosphorus silica dissolved oxygen cohesive sediments noncohesive sediment sediment diagenesis conservative tracer user-defined constituent pesticides synthetic organics
Status	The FORTRAN model code is not proprietary. The source code and DOS executable for TOXI5, EUTRO5, and DYNHYD5 are distributed with the WASP package of models. A mailing list is available for support.
Graphical User Interface	A Windows 95/98/NT version of WASP, WIN/WASP+, includes a pre-processor, a data processor, and a graphical post-processor (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. 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 Water Quality Analysis Simulation Program WASP5, Part A: Model Documentation, Version 5.10, US Environmental Protection Agency, Env. Research Lab., Athens Georgia Ambrose, R.B., Wool, T.A., and Martin, J.L., 1993: The Water Quality Analysis Simulation Program WASP5, Part B: The WASP5 Input Dataset, Version 5.10, US Environmental Protection Agency, Env. Research Lab., Athens Georgia.
Project Abstracts	Appoquinimink River, DE | Fox River, WI

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