1. General Model Information

Name: Herbsim - herbicide degradation simulation

Acronym: HERBSIM

Main medium: terrestrial
Main subject: biogeochemistry
Organization level: Ecosystems
Type of model: compartment model
Main application:
Keywords: herbicide, pesticide, Arrhenius function, adsorption, degradation, desorption,


Dr. Bernd Diekkrueger
Dr. Otto Richter
Arbeitsgruppe Agrarökologie und Systemanalyse
Institut für Geographie und Geoökologie
Technische Universität Braunschweig
Langer-Kamp 19c
D-38106 Braunschweig

Phone: (0531) 391 - 5628 and -5606
Fax: (0531) 391-8170
email: b.diekkrueger@tu-bs.de O.Richter@tu-bs.de



Dr. Bernd Diekkrueger
Prof. Otto Richter


contents of the model
HERBSIM allows to calculate the decrease of herbicide concentration with time as affected by sorption of the substance to soil particles and by microbial degradation. HERBSIM does not account for transport processes in the soil so that it can especially be applied to laboratory experiments and field sites where transport is negligible.
principles of the model
Various individual models were included to describe sorption and microbial degradation of a herbicide. The dependence of degradation rates and sorption on soil temperature and soil moisture can be accounted for using several approaches. Main emphasis was directed towards modelling non-linear degradation and sorption kinetics. In general, models can be build by combining the equations provided by the HERBSIM modelling system. This documentation aimed at presenting a model which includes as many submodels as possible. However, it can not claim to be complete, especially since some of the features of HERBSIM are not described in the available references. If any other than the full model is used, parameter abbreviations may differ from those given in this document.

Author of the abstract: UFIS - Environmental research information system

II. Technical Information

II.1 Executables:

Operating System(s): DOS Type of computer: PC Peripherical software required: Turbo Vision

II.2 Source-code:

Programming Language(s): Turbo Pascal 7.0

II.3 Manuals:

Manual: Diekkrueger, B.: Systemhandbuch und Benutzerhandbuch fuer SIMULAT 2.2 und Demonstrat 2.2. Complete model documentation: Richter, O.; Diekkrueger, B.: HERBSIM - Ein Modellsystem zur Berechnung von Sorption und Abbau von Pestiziden, SFB 179, Forschungsbericht 1991-1993 (1993), pp. 95-114.

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

Richter, O., Diekkrueger, B., 1993.HERBSIM - Ein Modellsystem zur Berechnung von Sorption und Abbau von PestizidenSFB 179, Forschungsbericht 1991-1993, 95-114.

Richter, O., Noertershaeuser, P., Diekkrueger, B., 1992.Modeling Reactions and Movement of Organic Chemicals in Soils by Coupling of Biological andPhysical Processes
Modeling Geo-Biosphere Processes 1, 95-114.

Diekkrueger, B.Systemhandbuch und Benutzerhandbuch fuer SIMULAT 2.2 und Demonstrat 2.2.

O'Neill, R., 1968.Population Energetics of a Milipede. Narceus americanus (Beavois)Ecology 49, 803-809.

O'Neill, R., Oldstein, R., Shugart, H., Makin, J., 1972.Terrestrial Ecosystem Energy ModelEast. Dicid. For. Biome Memo Rep. 72-19 (1972), 1-38.

V. Further information in the World-Wide-Web

VI. Additional remarks

Additional information
Last review of this document by: R. Patzak : 2. October 1997 -
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:44 CEST 2002

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