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Documentation of a numerical code for the simulation of variable density ground-water flow in three dimensions

January 1, 1985

A numerical code is documented for the simulation of variable density time dependent groundwater flow in three dimensions. The groundwater density, although variable with distance, is assumed to be constant in time. The Integrated Finite Difference grid elements in the code follow the geologic strata in the modeled area. If appropriate, the determination of hydraulic head in confining beds can be deleted to decrease computation time. The strongly implicit procedure (SIP), successive over-relaxation (SOR), and eight different preconditioned conjugate gradient (PCG) methods are used to solve the approximating equations. The use of the computer program that performs the calculations in the numerical code is emphasized. Detailed instructions are given for using the computer program, including input data formats. An example simulation and the Fortran listing of the program are included. (USGS)

Publication Year 1985
Title Documentation of a numerical code for the simulation of variable density ground-water flow in three dimensions
DOI 10.3133/wri844302
Authors L.K. Kuiper
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Water-Resources Investigations Report
Series Number 84-4302
Index ID wri844302
Record Source USGS Publications Warehouse