1. General Model Information

Name: RITZ Interactive simulation of the fate of harzadous chemicals during land

Acronym: RITZ

Main medium: terrestrial
Main subject: biogeochemistry
Organization level: ecosystem
Type of model: not specified
Main application:
Keywords: chemical movement, degradation, volatilization, water movement


United States
Environmental Protection

Center for Subsurface
Modeling Supperot
Ada, OK



D.L. Nofziger, J.R. Williams
Department of Agronomy
Oklahoma State University
Stillwater, OK 74078


The Regulatory and Investigative Treatment Zone Model, RITZ, (Short 1985) was developed to help decision-makers systematically estimate the movement and fate of hazardous chemicals during land treatment of oily wastes. The model considers the downward movement of the pollutant with the soil solution, volatilization and loss to the atmosphere, and degradation. The model incorporates the influence of oil upon the transport and fate of the pollutant. This RITZ model forms the basis of this interactive software system. The software enables users to conveniently enter the required soil, chemical, environmetal, and management parameters and checks the validity of these entries. The user may then select graphical and tabular outputs of the quantities of interest.

The manual describes the basic concepts of RITZ and lists the inherent assumptions. The manual, also, describes the use of the interactive software and the hardware and software requirements for it. Illustrative examples of the software are presented. The appendix includes a list of the mathematical equations used in the software.

II. Technical Information

II.1 Executables:

Operating System(s):
  • Download Installation Instructions for all CSMoS Software
  • Download RITZ Installation Disk MS-DOS, PC-DOS

    II.2 Source-code:

    Programming Language(s):

    II.3 Manuals:

    Download RITZ Documentation

    II.4 Data:

    III. Mathematical Information

    III.1 Mathematics

    III.2 Quantities

    III.2.1 Input

    III.2.2 Output

    IV. References

    Short, Thomas E., 1985. Movements of contaminants from oily wastes during land treatment. Proceedings of Conference on Environmental and Public Health Effects of Soils Contaminated with Petroleum Products, Amherst, MA.

    V. Further information in the World-Wide-Web

    VI. Additional remarks

    Last review of this document by: R. Patzak : 15. October 1997
    Status of the document:
    last modified by Tobias Gabele Wed Aug 21 21:44:48 CEST 2002

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