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A version of MODFLOW-2005 with modifications for Colorado Decision Support Systems

MODFLOW-CDSS is a three-dimensional, finite-difference groundwater-flow model based on MODFLOW-2005, with two modifications designed to support development of groundwater models for Colorado's Decision Support Systems. The first modification is the introduction of a Partition Stress Boundaries (PSB) 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 distribution includes a version of MODFLOW-LGR (MODFLOW-2005 with Local Grid Refinement) that supports the PSB capability.

Partition Stress Boundaries example

Partition Stress Boundaries example: the Recharge, River, and Well Packages of MODFLOW-2005 have been partitioned. Each partition is identified as a separate budget component in MODFLOW-2005 output and in the chart above.

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.


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