Simulating Solute Transport Across Horizontal-Flow Barriers Using the MODFLOW Ground-Water Transport Process

摘要

This report describes modifications to a U.S. Geological Survey (USGS) three-dimensional solute-transport model (MODFLOW-GWT), which is incorporated into the USGS MODFLOW ground-water model as the Ground-Water Transport (GWT) Process. The modifications improve the capability of MODFLOW-GWT to accurately simulate solute transport in simulations that use the Horizontal-Flow Barrier (HFB) Package in MODFLOW. The updated code (called the CHFB Package) (1) allows the user to input dispersivity and diffusion properties of HFB barriers, and (2) modifies the calculation of dispersive solute flux near barriers.