By P.C. Trescott, G. F. Pinder and S. P. Larson
Abstract
Introduction
Theoretical development
Ground-water flow equation
Finite-difference approximations
Source term
Leakage
Evapotranspiration
Computation of head at the radius of a pumping well
Combined artesian-water-table simulation
Transmissivity
Storage
Leakage
Test problems
Numerical solution
Line successive overrelaxation
Two-dimensional correction to LSOR
LSOR acceleration parameter
Alternating-direction implicit procedure
Strongly implicit procedure
Comparison of numerical results
Considerations in designing an aquifer model
Boundary conditions
Initial conditions
Designing the finite-difference grid
Selected references
Attachment I, notation
Attachment II, computer program
Main program
Subroutine DATA1
Time parameters
Initialization
Subroutine STEP
Maximum head change for each iteration
Subroutine SOLVE
SIP iteration parameters
Exceeding permitted iterations
Subroutine COEF
Transient leakage coefficients
Transmissivity as a function of head
TR and TC coefficients
Subroutine CHECK1
Subroutine PRNTAI
BLOCK DATA routine
Technical information
Storage requirements
Computation time
Use of disk facilities for storage of array data and interim results
Graphical display package
Modification of program logic
Fortran IV
Limitations of program
Attachment III, data deck instructions
Attachment IV, sample aquifer simulation and job control language
Attachment V, generalized flow chart for aquifer simulation model
Attachment VI, definition of program variables
Attachment VII, program listing
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