Category Groundwater flow (3D)
Publisher  US Geological Survey 
Platform DOS
Status Public domain
Description JDB2D-3D consists of two fairly simple, modifiable programs for solving the 2D, single-aquifer (JDB2D) and quasi-3D, multi-aquifer (JDB3D) formulation of the transient ground-water flow equation for confined and leaky-confined aquifer systems. The governing equations are approximated using central finite differences for the spatial derivative together with a block-centred formulation. The finite difference equations are solved using the Strongly Implicit Procedure (SIP). The code solves the equations independent of units, allowing the user to specify any consistent units. The model requires a no-flow boundary around the area of computational interest, and source functions are used to approximate boundary conditions other than no-flow. Input is developed by using a text editor. Output files include text files with input data and results, and a file with locations and computed heads for graphic post-processing.
Cost US Dollars 50
Data formats supported None stated
Supplier in United States of America  International Ground Water Modeling Center 

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