Modeling multiphase migration of organic chemicals in groundwater systems--a review and assessment.

A composite numerical model for assessing subsurface transport of oily wastes and chemical constituents

Subsurface fate and transport models are utilized to predict concentrations of chemicals leaching from wastes into downgradient receptor wells. The contaminant concentrations in groundwater provide a measure of the risk to human health and the environment. The level of potential risk is currently used by the U.S. Environmental Protection Agency to determine whether management of the wastes shou...

Modeling organic chemical fate in aquatic systems: significance of bioaccumulation and relevant time-space scales.

The importance of aquatic food chain bioaccumulation of organic chemicals in contributing to human dose is derived. It is shown that for chemicals with log octanol water partition coefficients greater than about 3, the role of food chain transfer to fish consumed by humans becomes the more dominant route over drinking water. Modeling of aquatic food chain bioaccumulation then becomes necessary ...

Dispersion in Modeling Multiphase Transport through Heterogeneous Geological Media

340 Numerical modeling approaches for multiphase fl ow and tracer or chemical transport in porous media are generally based on methodologies developed for reservoir simulation and groundwater modeling. They involve solving coupled massconservation equations that govern the transport processes of all chemical components in isothermal and nonisothermal subsurface systems using fi nite-difference ...

A review of measurement of organic compound transformation in groundwater

Risk assessment of industrial hydrocarbon release and transport in the vadose zone as it travels to groundwater table: A case study

In this paper, a modeling tool for risk assessment analysis of the movement of hydrocarbon contaminants in the vadose zone and mass flux of contamination release into the groundwater table was developed. Also, advection-diffusion-reaction equations in combination with a three-phase equilibrium state between trapped air, soil humidity, and solid particles of unsaturated soil matrix were numerica...