1. General Model Information

Name: Enhanced Stream Water Quality Model with Uncertainty Analysis

Acronym: QUAL2EU

Main medium: aquatic
Main subject: biogeochemistry
Organization level: ecosystem
Type of model: ordinary differential equations
Main application:
Keywords: stream, lakes, pollutants, uncertainty analysis, water quality, nutrient cycles, algal production, benthic and carbonaceous demand, atmospheric reaeration, dissolved oxygen balance


Center for Exposure Assessment Modeling (CEAM) (EPA)

EPA Environmental Research Laboratory
College Station Road
Athens, Georgia 30613
Fax :



QUAL2EU model system

The Enhanced Stream Water Quality Model (QUAL2E) is a steady state model for conventional pollutants in branching streams and well mixed lakes. It can be operated either as a steady-state or dynamic model and is intended for use as a water quality planning tool. The model can be used to study impact of waste loads on instream water quality and identify magnitude and quality characteristics of non-point waste loads.

The Enhanced Stream Water Quality Model with Uncertainty Analysis (QUAL2EU) is an enhancement to the QUAL2E model that allows the user to perform uncertainty analysis. Three uncertainty options are available. AQUAL2 is an interactive data preprocessor program for the QUAL2E and QUAL2EU models. AQUAL2 can be used to build input data files for either model. Q2PLOT is an interactive data post processor program for both.

II. Technical Information

II.1 Executables:

Operating System(s): DOS

II.2 Source-code:

Programming Language(s): FORTRAN

II.3 Manuals:

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: T. Gabele: Thu Sep 18 1997
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:48 CEST 2002

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