GGSD Program Details for WHPA

WHPA

Category	Contaminant transport (2D analytical)
Publisher	US Environmental Protection Agency
Platform	DOS
Status	Public domain
Description	WHPA is an integrated program of analytical and semi-analytical solutions for the groundwater flow equation coupled with pathline tracking. It is designed to assist technical staff with delineation of wellhead protection areas. Developed for the U.S. EPA's Office of Groundwater Protection, the package includes modules for capture zone delineation in a homogeneous aquifer with 2D steady-state flow with options for multiple pumping/injection wells and barrier or stream boundary conditions, based on the model RESSQ, among others. Aquifers may be confined, semi-confined, or unconfined with areal recharge. Also included are modules for Monte Carlo analysis of uncertainty, and a particle-tracking postprocessor for numerical flow models such as MODFLOW and PLASM, using a 2D rectangular grid. The model computes capture zones, pathlines, and hydraulic head distribution. It has extensive on-screen and plotting graphic capabilities.
Cost	US Dollars 90
Data formats supported	None stated
Supplier in United States of America	International Ground Water Modeling Center
Supplier in United States of America	US Environmental Protection Agency