VLEACH

Vadose zone LEACHing model

VLEACH is a one-dimensional finite difference model for simulating the vertical mobilization and migration of dissolved organic contaminants through the vadose zone. This model is commonly used to evaluate potential groundwater impacts, and to predict volatilization or VOCs.

Model Details

• One layer profile
• Homogeneous soil properties
• Depth-dependent initial soil concentrations
• Constant recharge rate
• Includes a limited database of soil and chemical properties

Simulated Processes

• Steady-state flow and transport of volatile organic contaminants through the unsaturated zone
• Leaching of soil contaminants to infiltrating groundwater, sorption of dissolved contaminants on soil, volatilization and diffusion of contaminants to the atmosphere

Simulation Results

• Graphical and tabular reports of soil concentration vs. time for selected profile depths
• Graphical and tabular reports of groundwater concentration vs. time for selected profile depths
• Graphical and tabular reports of vapor phase concentration vs. time for selected profile depths
• Profile mass balances for soil, groundwater and vapor phase