1. General Model Information

Name: DEMETER/SOIL_MOD - water-, heat-, nitrogen dynamics in soil


Main medium: terrestrial
Main subject: biogeochemistry, hydrology
Organization level: Ecosystems
Type of model: compartment model
Main application:
Keywords: agroecosystem, nitrogen dynamic, soil, soil temperature, water transport,


Dr. Thomas Kartschall
Potsdam Institute for Climate Impact Research
P.O. Box 601203
14412 Potsdam, Germany
Phone: ++49-331-288-2529
Fax : ++49-331-288-2640
email: Thomas@Pik-Potsdam.de


E. Matthaeus
Dr. Thomas Kartschall
C. Fruehauf
Susanne Grossman
Frank Wechsung


contents of the model
The complex model of soil SOIL_MOD was developed to describe the soil water, temperature and nitrogen dynamics. It is part of the agroecosystem model system DEMETER. This model system consists the winter wheat model TRITSIM, the soil dynamics model SOIL_MOD and the root dynamics model ROOT_MOD and investigates the water and nutrient flows in an agroecosystem.
principles of the model
The model works discretely in time (time step 1 day) and depth (maximum 30 layers of any thickness) and in a hierarchic sequence. For every simulation step the results of the water submodel and the soil temperature submodel will be used in the soil nitrogen submodel. Soil water regime is calculated by using a capacity approach, for escribing the dynamics of soil temperature the one dimensional differential equation for heat conduction is used.

Author of Abstract: UFIS - Environmental Research Information System

II. Technical Information

II.1 Executables:

Operating System(s):

II.2 Source-code:

Programming Language(s):

II.3 Manuals:

Complete model documentation: Matthaeus, E.; Kartschall, Th.; Fruehauf, C.; Grossman, S.; Wechsung, F.: The agroecosystem model winter wheat DEMETER, Forschungsbericht, Potsdam-Institut fuer Klimafolgenforschung (1992).

II.4 Data:

III. Mathematical Information

III.1 Mathematics

This is a list of model equations sorted by their characteristics with hypertext links for more details.

III.2 Quantities

This is a list of model quantities sorted by their characteristics with hypertext links for more details.

III.2.1 Input

III.2.2 Output

IV. References

Matthaeus, E., Kartschall, Th., Fruehauf, C., Grossman, S., Wechsung, F., 1992.The agroecosystem model winter wheat DEMETER. Forschungsbericht, Potsdam-Institut fuer Klimafolgenforschung.

Stanford, G., Smith, S.J., 1972.Nitrogen mineralization potentials of soils.
Soil Sci. Sco. Amer. Proc. 36, 103 - 107.

Goudriaan, J., 1977.Crop micrometeorology. A simulation study.
Simulation Monographs, 249 pp.

Penman, H.L., 1956.Evaporation. An introduction survey.
Neth. J. agric. Sci. 4, 9-29.

Penman, H.L., 1948.Natural evaporation from open water, bare, soil and grass.
Proc. Roy. Soc., London, pp. 120-145.

Groot, J.J.R., Verberne, E.L.J., 1991Response of wheat to nitrogen fertilization, a data set to validate simulation models for nitrogen in crop and soil.
Fertilizer Research 27, Kluwer Academic Publishers, pp. 349 - 383.

Groot, J.J.R., 1987.Simulation of nitrogen balance in a system of winter wheat and soil. In: Simulation report CAOBO - TT13.

V. Further information in the World-Wide-Web

VI. Additional remarks

Additional information
Last review of this document by: R. Patzak : 1. October 1997 -
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:41 CEST 2002

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