1. General Model Information

Name: CHEMSEE - Modelling of Reactive Substances in Lakes

Acronym: CHEMSEE


Main medium: aquatic
Main subject: biogeochemistry
Organization level: Ecosystem
Type of model: ordinary differential equations
Main application:
Keywords: water quality, reactive substances, deep lakes,loading, adsorption, sedimentation, air-water and sediment-water exchange, chemical reactions

Contact:

Markus Ulrich

EAWAG
Ueberlandstrasse 133
CH-8600 Dübendorf Switzerland
phone: +41-1-823-5464
fax: +41-1-823-5028
email: ulrich@eawag.ch

http://www.eawag.ch/

Author(s):

Johnson, C.A., M. Ulrich, L. Sigg, and D. M. Imboden

Abstract:

CHEMSEE is a flexible "model construction kit" for the modeling of chemical processes in lakes. The program with a user interface consisting of menus, standard dialog boxes and graphic windows, was developed on the Apple Macintosh personal computer, and is currently in use both in teaching and research.

Underlying the program is the mathematical description of the behavior of a substance in terms of a one-dimensional vertical model. Such a model, in which horizontal concentration differences are neglected, is suitable for the description of reactive substances in deep lakes. Physical processes occurring in a lake are not influenced by the presence of trace substances and are therefore represented in the model by corresponding input parameters (e.g. epilimnion depth, temperature etc.). Any number of variables may be defined by the user to represent the concentrations of substances and particles in the water column, and of substances in the sediments. Transport and transformation processes (loading, adsorption, sedimentation, air-water and sediment-water exchange, chemical reactions) can be defined interactively. The results of simulation runs are output both graphically and on file, and the interactively defined models can be saved for future use. The program can be used to solve problems related to the following problems:


II. Technical Information

II.1 Executables:

Operating System(s): Apple Macintosh: 500kB RAM; No additional software required. IBM compatibles: Windows 3.1, Windows NT or Windows 95. 500kB RAM; Price: University/Teaching/Personal: CHF 300.- (approx. US$ 255.-) Commercial (not for Windows): CHF 1000.- (approx. US$ 850.-)

II.2 Source-code:

Programming Language(s): Price: University/Teaching/Personal: CHF 300.- (approx. US$ 255.-) Commercial (not for Windows): CHF 1000.- (approx. US$ 850.-)

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

Ulrich M.(1991). Modeling of Chemicals in Lakes - Development and Application of User-Friendly Simulation Software (MASAS & CHEMSEE) on Personal Computers. Dissertation ETH No. 9632.

Johnson, C.A., M. Ulrich, L. Sigg, and D. M. Imboden (1991). A Mathematical Model of the Manganese Cycle in a Seasonally Anoxic Lake. Limnol. Oceanogr. 36/7, 1415-1426.



V. Further information in the World-Wide-Web


VI. Additional remarks

Information and remarks about the application of this model


Last review of this document by: T. Gabele: Tue Oct 7 1997
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:40 CEST 2002

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