Variable thickness transient groundwater flow model: user's manual. Final report

The central thrust of the research and development work is to implement numerical models for description and prediction of subsurface leachate movement in saturated and partially saturated flow systems in soil beneath Flue Gas Desulfurization (FGD) sludge disposal areas. A subtask of this project is to document the modeling technology to make it generally useful to EPRI and the power companies for evaluation of ground disposal of wastes and sludges. This report is the first in a series of user's manuals which will describe the use of groundwater flow (both saturated and partially saturated) and transport codes. This document describes the use of the Variable Thickness Transient (VTT) groundwater flow code. The VTT code uses finite difference techniques to simulate two-dimensional saturated groundwater flow. The code can be used to simulate either confined or unconfined aquifer conditions in either a steady state or transient mode. The code can model one, two, or three geologic layers.