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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

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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.

Additional Publication Details

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
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.