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Navigation: Online Guide to MODFLOW > Groundwater Flow Process > Solvers

SOR - Slice-Successive Overrelaxation Package

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Abbreviation in Name file

SOR

Purpose

The Slice-Successive Overrelaxation package is used to solve the finite difference equations in each step of a MODFLOW stress period.

Documentation

Harbaugh, A.W., Banta, E.R., Hill, M.C., and McDonald, M.G., 2000, MODFLOW-2000, the U.S. Geological Survey modular ground-water model -- User guide to modularization concepts and the Ground-Water Flow Process: U.S. Geological Survey Open-File Report 00-92, 121 p.

Related Packages

Solvers

Supported in

MODFLOW-2000

Other Notes

The SOR solver doesn't work well with the wetting capability.

If the Lake package is used, more iterations may be required.

Input Instructions

Input to the Slice-Successive Overrelaxation (SOR) Package is read from the file that is type "SOR" in the name file. All numeric variables are free format if the option “FREE” is specified in the Basic Package input file; otherwise, all the variables have 10-character fields.

FOR EACH SIMULATION

Data Set 0

[#Text]

Item 0 is optional—“#” must be in column 1. Item 0 can be repeated multiple times.

Data Set 1

Data Set 2

ACCL HCLOSE IPRSOR