GGSD Program Details for THWELLS

THWELLS

Category	Groundwater modelling
Publisher	International Ground Water Modeling Center
Platform	DOS
Status	Public domain
Description	THWELLS is an analytical model for calculating the drawdown or build-up of piezometric head due to the combined effect of up to 100 pumping and/or injection wells. The calculation of total drawdown is based on the Theis equation or Hantush-Jacob equation for non-steady state flow in an isotropic, homogeneous confined, leaky confined or unconfined aquifer of infinite extent. The computed effects of individual wells are superimposed on a regional, horizontal or sloping ground-water surface. The model can be used for water-table aquifers for the case where the calculated drawdowns are less than half the saturated thickness of the aquifer. Boundary effects can be included through the use of image well theory.
Cost	US Dollars 90
Data formats supported	None stated
Supplier in United States of America	International Ground Water Modeling Center