Simulation of Oxygen Dynamics in the Vadose Zone

by David K. Stevens, Utah State Univ, Logan, UT, USA,
Zhao Yan, Utah State Univ, Logan, UT, USA,
William J. Grenney, Utah State Univ, Logan, UT, USA,

Document Type: Proceeding Paper

Part of: Environmental Engineering


A microcomputer model VIP (Vadose Zone Interactive Processes) was developed as an extension of the RITZ model to provide a mathematical description of land treatment systems for the disposal of hazardous waste constituents and for simulating transport of hazardous substances and oxygen in the vadose (unsaturated) zone of the soil. The model simulates several important vadose zone processes including volatilization, degradation, adsorption/desorption, advection, and dispersion. The VIP model was tested against experimental data using three polynuclear aromatic (PNA) compounds. VIP has also been used for predicting the persistence and mobility of petroleum refining waste applied to the soil in land treatment systems, and for the evaluation of the mobility of pesticides in soil. The purpose of this paper is apply the VIP model to simulate the short term dynamics of oxygen at a petroleum waste land treatment site in Ontario, Canada.

Subject Headings: Soil treatment | Vadose zone | Mathematical models | Soil dynamics | Computer models | Simulation models | Hazardous substances | Waste treatment | Canada | Ontario

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