thumbnail

Documentation of a computer program to simulate aquifer-system compaction using the modular finite-difference ground-water flow model

Open-File Report 88-482
By:  and 
https://doi.org/10.3133/ofr88482

Links

Abstract

The process of permanent compaction is not routinely included in simulations of groundwater flow. To simulate storage changes from both elastic and inelastic compaction, a computer program was written for use with the U. S. Geological Survey modular finite-difference groundwater flow model. The new program is called the Interbed-Storage Package. In the Interbed-Storage Package, elastic compaction or expansion is assumed to be proportional to change in head. The constant of proportionality is the product of skeletal component of elastic specific storage and thickness of the sediments. Similarly, inelastic compaction is assumed to be proportional to decline in head. The constant of proportionality is the product of the skeletal component of inelastic specific storage and the thickness of the sediments. Storage changes are incorporated into the groundwater flow model by adding an additional term to the flow equation. Within a model time step, the package appropriately apportions storage changes between elastic and inelastic components on the basis of the relation of simulated head to the previous minimum head. Another package that allows for a time-varying specified-head boundary is also documented. This package was written to reduce the data requirements for test simulations of the Interbed-Storage Package. (USGS)
Publication type Report
Publication Subtype USGS Numbered Series
Title Documentation of a computer program to simulate aquifer-system compaction using the modular finite-difference ground-water flow model
Series title Open-File Report
Series number 88-482
DOI 10.3133/ofr88482
Year Published 1988
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description vi, 80 p.
Google Analytic Metrics Metrics page
Additional publication details