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Open-File Report 2011–1213

Prepared in cooperation with the Colorado Water Conservation Board

MODFLOW-CDSS, a Version of MODFLOW-2005 with Modifications for Colorado Decision Support Systems

By Edward R. Banta

Thumbnail of and link to report PDF (393 kB)Abstract

MODFLOW-CDSS is a three-dimensional, finite-difference groundwater-flow model based on MODFLOW-2005, with two modifications. The first modification is the introduction of a Partition Stress Boundaries capability, which enables the user to partition a selected subset of MODFLOW’s stress-boundary packages, with each partition defined by a separate input file. Volumetric water-budget components of each partition are tracked and listed separately in the volumetric water-budget tables.

The second modification enables the user to specify that execution of a simulation should continue despite failure of the solver to satisfy convergence criteria. This modification is particularly intended to be used in conjunction with automated model-analysis software; its use is not recommended for other purposes.

First posted September 30, 2011

For additional information contact:
Center Director, USGS Colorado Water Science Center
Box 25046, Mail Stop 415
Denver, CO 80225

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Suggested citation:

Banta, E.R., 2011, MODFLOW-CDSS, a version of MODFLOW-2005 with modifications for Colorado Decision Support Systems: U.S. Geological Survey Open-File Report 2011–1213, 19 p.




Purpose and Scope

Partition Stress Boundaries Capability

Option to Override Solver Convergence Failure

Distribution and Compiling


References Cited

Appendix 1: Programmer Documentation for the Partition Stress Boundaries Capability

Appendix 2: Partition Stress Boundaries Example

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