Modifications to the modular three-dimensional finite-difference ground-water flow model used for the Columbia Plateau Regional Aquifer-System Analysis, Washington, Oregon, and Idaho
Open-File Report
91-532
By: A. J. Hansen Jr.
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Abstract
The report documents modifications to the U.S. Geological Survey's modular three-dimensional finite-difference ground-water flow model used for a regional aquifer-system analysis of the Columbia Plateau. The report, which describes the concepts and mathematical basis for the modifications, is intended for potential users who are familiar with the original modular model. The modifications permit flow from a layer to any adjacent layer, allow the model to retain a cell of a layer that has been cut completely through by a canyon, and allow placing ground-water flow barriers on only specified branch conductances; a special version of the modified model uses a convergent grid. The report describes the data-input items that this modified model must read.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Modifications to the modular three-dimensional finite-difference ground-water flow model used for the Columbia Plateau Regional Aquifer-System Analysis, Washington, Oregon, and Idaho |
| Series title | Open-File Report |
| Series number | 91-532 |
| DOI | 10.3133/ofr91532 |
| Edition | - |
| Year Published | 1993 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey ; Earth Science Information Center, Open-File Reports Section [distributor], |
| Description | iv, 83 p. :ill., map ;28 cm. |
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