MODFLOW Ground-Water Model - User Guide to the Subsidence and Aquifer-System Compaction Package (SUB-WT) for Water-Table Aquifers
Techniques and Methods
6-A23
Prepared in Cooperation with the Central Arizona Water Conservation District
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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.
Suggested Citation
Leake, S.A., Galloway, D., 2007, MODFLOW Ground-Water Model - User Guide to the Subsidence and Aquifer-System Compaction Package (SUB-WT) for Water-Table Aquifers: U.S. Geological Survey Techniques and Methods 6-A23, vi, 42 p., https://doi.org/10.3133/tm6A23.
ISSN: 2328-7055 (online)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | MODFLOW Ground-Water Model - User Guide to the Subsidence and Aquifer-System Compaction Package (SUB-WT) for Water-Table Aquifers |
| Series title | Techniques and Methods |
| Series number | 6-A23 |
| DOI | 10.3133/tm6A23 |
| Year Published | 2007 |
| Language | English |
| Publisher | U. S. Geological Survey |
| Contributing office(s) | Arizona Water Science Center, Ohio-Kentucky-Indiana Water Science Center |
| Description | vi, 42 p. |
| Larger Work Type | Report |
| Larger Work Subtype | USGS Numbered Series |
| Larger Work Title | Chapter 23 of Section A, Ground Water, of Book 6, Modeling Techniques |