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

Hansen, A. J., Jr.

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.

Genre:

USGS Numbered Series

ProdID:

19218

Citation Author:

Hansen, A. J., Jr.

Citation Contributing Office:

Citation Datum:

Citation Day:

Citation Edition:

Citation Editor:

Citation End Page:

Citation Issue:

Citation Keywords:

Citation Language:

ENGLISH

Citation Larger Work Title:

Citation LatN:

Citation LatS:

Citation LonE:

Citation LonW:

Citation Month:

Citation No Pagination:

Citation Number Of Pages:

Citation Online Only Flag:

Citation Phsyical Description:

iv, 83 p. :ill., map ;28 cm.

Citation Projection:

Citation Public Comments:

Citation Publisher:

U.S. Geological Survey ; Earth Science Information Center, Open-File Reports Section [distributor],

Citation Series:

Open-File Report

Citation Series Code:

OFR

Citation Series Number:

91-532

Citation Search Results Text:

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; 1993; OFR; 91-532; Hansen, A. J., Jr.