MODFLOW Ground-Water Model - User Guide to the Subsidence and Aquifer-System Compaction Package (SUB-WT) for Water-Table Aquifers

Leake, S. A.; Galloway, D. L.

Abstract:

A new computer program was developed to simulate vertical compaction in models of regional ground-water flow. The program simulates ground-water storage changes and compaction in discontinuous interbeds or in extensive confining units, accounting for stress-dependent changes in storage properties. The new program is a package for MODFLOW, the U.S. Geological Survey modular finite-difference ground-water flow model. Several features of the program make it useful for application in shallow, unconfined flow systems. Geostatic stress can be treated as a function of water-table elevation, and compaction is a function of computed changes in effective stress at the bottom of a model layer. Thickness of compressible sediments in an unconfined model layer can vary in proportion to saturated thickness.

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USGS Numbered Series

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80391

Citation Author:

Leake, S. A.; Galloway, D. L.

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USGS Arizona Water Science

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Version 1.0

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ENGLISH

Citation Larger Work Title:

Chapter 23 of Section A, Ground Water, of Book 6, Modeling Techniques

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Citation Phsyical Description:

vi, 42 p.

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Prepared in Cooperation with the Central Arizona Water Conservation District

Citation Publisher:

Geological Survey (U.S.)

Citation Series:

Techniques and Methods

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Citation Series Number:

6-A23

Citation Search Results Text:

MODFLOW Ground-Water Model - User Guide to the Subsidence and Aquifer-System Compaction Package (SUB-WT) for Water-Table Aquifers; 2007; TM; 6-A23; Chapter 23 of Section A, Ground Water, of Book 6, Modeling Techniques; Leake, S. A.; Galloway, D. L.