1. General Model Information

Name: CemoS/Buckets - chemical transport in soil


Main medium: terrestial
Main subject: (eco)toxicology, biogeochemistry
Organization level: ecosystem
Type of model: compartment model
Main application:
Keywords: soil, deposition, exposure, chemical transfer, capillary rise, leaching, capacity cascade transport, local mass balance


Dr. Stefan Trapp
University of Osnabrueck
Institute of Environmental Systems Research
Artilleriestr 34
49069 Osnabrueck, Germany
Phone: +49-541-9692574
Fax : +49-541-969-2599


Guido Baumgartner
Bernhard Reiter
Sven Scheil
Stefan Schwartz
Jan-Oliver Wagner
Dr. Stefan Trapp
Prof. Michael Matthies Email:cemos@skylla.mathematik.uni-osnabrueck.de


contents of the model
The model is part of the model package CemoS, a program system for exposure concentration estimates of environmentally hazardous chemicals. CemoS/Buckets is a cascade model for the description of transport and residing of chemicals in soil. The model is not applicable to chemicals which are transportated mainly in the gaseous phase ($K_{aw} > 10^{-3})$. The simulation can be carried out with or without capillary rise of the chemical.
principles of the model
The basic equations are as in the model approach by {\em Burns} (published in {\em Richter}, 1990). In the model, the soil column is partitioned in $n$ layers. The chemical distribution in the soil at the start of the simulation can be given interactively. Further chemical input occurs due to rain. The amount of the chemical and the water content in each soil layer is determined for each day by difference equations. At the beginning of each time step, the water balance $WB$ at soil surface is calculated. In case of positive $WB$, the program starts the process 'infiltration', in case of negative $WB$ the process 'evaporation'. The 1-dimensional chemical transfer is calculated from the amount of water movement on a proportional basis.

Author of Abstract: UFIS - Environmental Research Information System

II. Technical Information

II.1 Executables:

Operating System(s): MS-DOS Type of computer: PC Disc space: 1 MB List of files: CEMOS.EXE executeable program; CEMOS.OVR; STDSUB.DAB substance data; EGAVGA.BGI graphic file; CEMOS.HLP& help file; CEMOS.RES string file;

II.2 Source-code:

Programming Language(s): Borland Pascal 7.0

II.3 Manuals:

Manual: Trapp, St. ; Matthies, M.: Dynamik von Schadstoffen - Umweltmodellierung mit Cemos, Springer, Berlin (1996). ISBN 3-540-59312-8. Complete model documentation: Trapp, St. ; Matthies, M.: Dynamik von Schadstoffen - Umweltmodellierung mit Cemos, Springer, Berlin (1996). ISBN 3-540-59312-8.

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

Projektgruppe Exposmod. 1995. CemoS Handbuch.(in german)

Benzler, J.H., Finnen, H., Müller, W., Roeschmann, G., 1982. Bodenkundliche Kartieranleitung. Landesanstalt fuer Geowissenschaften und Geologische Landesaemter in der BRD, Hannover.

Burns, I.G., 1974. A Model for Predicting the Redistribution of Salts Applied to Fallow Soils after Excess Rainfall or Evaporation.J. Soil Science 25, No.2 165-178.

Karickhoff, S.W., 1981. Semi-Empirical Estimation of Sorption of Hydrophobic Pollutants on Natural Sediments and Soils. Chemosphere 10, Pergamon, Oxford, UK. pp. 833-846.

Richter, J., 1990. Models for processes in the soil. Catena paperback.

Schwarzenbach, R.; Westall, J. 1981. Transport of Nonpolar Organic Compounds from Surface Water to Groundwater: Laboratory Sorption Studies. Environ. Sci. Technol. 15: 1360-1367.

V. Further information in the World-Wide-Web

VI. Additional remarks

Additional information
Last review of this document by: R. Patzak : 30. September 1997 -
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:40 CEST 2002

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