1. General Model Information

Name: Modular Simulator of Soil and Root Processes

Acronym: 2DSOIL

Main medium: terrestrial
Main subject: biogeochemistry
Organization level: ecosystem
Type of model: partial differential equations (finite elements,2D), ordinary differential equations
Main application:
Keywords: soil process, water flow, solute transport, gas transport, heat transport, root water uptake, modular, richards equation, convection-dispersion equation


Dennis J. Timlin

USDA-ARS Systems Research Lab
Bldg 007, Rm 008
10300 Baltimore Ave
Beltsville, MD 20705
Phone: (301)504-6255
Fax: (301)504-5823
email: dtimlin@asrr.arsusda.gov


D. Timlin


2DSOIL is a comprehensive 2-dimensional model of soil and root processes to track agricultural impact on water quality.
The goal of this study was to develop the framework for a generic soil simulator that could easily be modified and incorporated into crop models. Soil & root processes are represented by modules that interact on the spatial-temporal grid covering the soil profile and the simulated time interval. Data were divided into public & private components to minimize information passing between modules. This modular structure and information hiding simplifies replacement or addition of modules & promotes code reuse. The classes of modules include:

Examples include the incorporation into a simple crop model & the expansion of 2DSOIL with a management module to simulate chemical application. The documentation includes instructions for adding customized modules.
Author of the abstract: D. Timlin

The code in most of the modules comes from existing models. These models and their authors include GLYCIM-Basil Acock, SWMS_2D-Jerka Simunek, Tomas Vogel and Rien van Genuchten. The nitrogen code was adapted from the model SOILN developed by L. Bergstrom and H. Johnsson. The chemistry code comes from a model developed by Ya. Pachepsky and T.K. Platonova. 2DSOIL has not been validated but SOILN, GLYCIM and SWMS_2D which are incorporated into 2DSOIL have been tested. 2DSOIL has been tested for consistency with SWMS_2D and GLYCIM.
source: CIESIN Modeldatabase

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

Timlin, D.J., Pachepsky. Ya, Acock, B., Lemon, H. and Tent, A. 1995. 2DSOIL - A Two-Dimensional Modular Simulator of Soil and Root Processes.
In: Proceedings of the 1995 Workshop on Computer Applications in Water Management. 23 to 25 May, 1995. Colorado Water Resources Research Institute Information Series No. 79. Pg 174-178.
Timlin, D.J., Ya. Pachepsky, and B. Acock. 1996. A design for a modular,generic soil simulator to interface with plant models.
Agronomy J. 88:162-169.
Timlin, D.J. and Y. Pachepsky. 1997. A modular soil and root process simulator.
Ecological Modeling. 94,1:67-80.

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: D. Timlin, 4. 9. 1997
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:38 CEST 2002

Go back to Register of Ecological Models (R E M)