1. General Model Information

Name: Water Quality Analysis Simulation Program

Acronym: WASP

Main medium: aquatic
Main subject: biogeochemistry, hydrology
Organization level: ecosystems
Type of model: not specified
Main application:
Keywords: fate, transport, surface water, biochemical oxygen demand,dissolved oxygen dynamics, nutrients,eutrophication, bacterial contamination,organic chemical, heavy metal contamination, phytoplankton dynamics, sediment,water quality


Center for Exposure Assessment Modeling (CEAM) (EPA)

Phone: 706/355-8400
Fax: 706/355-8302
Homepage: http://www.epa.gov/athens/wwqtsc/html/wasp.html


Original Model: Di Toro et al., 1983; Connolly and Winfield, 1984; Ambrose, R.B. et al., 1988


The WASP5 system consists of two stand alone computer programs, DYNHYD5 and WASP5,that can be run in conjunction or separately. The hydrodynamics program, DYNHYD5, simulates the movement of water while the water quality program, WASP5, simulates the movement and interaction of pollutants within the water. While DYNHYD5 is delivered with WASP5, other hydrodynamic programs have also been linked with WASP. RIVMOD handles unsteady flow in one-dimensional rivers, while SED3D handles unsteady, three-dimensional flow in lakes and estuaries. WASP5 is supplied with two kinetic sub models to simulate two of the major classes of water quality problems: conventional pollution (involving dissolved oxygen, biochemical oxygen demand, nutrients and eutrophication) and toxic pollution (involving organic chemicals, metals, and sediment). The linkage of either sub model with the WASP5 program gives the models EUTRO5 and TOXI5, respectively. In most instances, TOXI5 is used for tracers by specifying no decay. The basic principle of both the hydrodynamics and water quality program is the conservation of mass. The water volume and water quality constituent masses being studied are tracked and accounted for over time and space using a series of mass balancing equations. The hydrodynamics program also conserves momentum, or energy, throughout time and space.

( Source: http://www.cee.odu.edu/cee/model/wsp_desc.html)

Actual Version is: 6.1

II. Technical Information

II.1 Executables:

Operating System(s): WINDOWS 98/NT/2000
but source code is available, therefore can also run under UNIX/LINUX (without graphical user interface)
Download (version6)

II.2 Source-code:

Programming Language(s): FORTRAN
Download (version5)

II.3 Manuals:

WASP6 User's Manual [PDF]

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: J. Bierwirth: 3.03.2001 -

Status of the document:
last modified by Joachim Benz Sun May 16 11:33:48 CEST 2004

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