Third party software consists of groundwater and return flow software developed outside of CDSS. Three products are available: MODFLOW-CDSS, MODFLOW-2000 and IDS Alluvial Water Accounting System.
MODFLOW-CDSS is a three-dimensional, finite-difference groundwater-flow model based on MODFLOW-2005, with two modifications for CDSS. 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.
- The ability to partition a selected subset of MODFLOW’s stress-boundary packages
- Enables the user to specify that execution of a simulation should continue despite failure of the solver to satisfy convergence criteria
- Ability to get volumetric water-budget components of each partition that are tracked and listed separately in the volumetric water-budget tables
- Solver modification is intended to be used in conjunction with automated model-analysis software where convergence becomes an issue; its use is not recommended for other purposes
||A version of MODFLOW-2005 with modifications for Colorado's Decision Support Systems.
||Report describing MODFLOW-CDSS, a three-dimensional, finite-difference groundwater-modeling program.
MODFLOW is a finite-difference groundwater model developed by the US Geological Survey
. Users can download groundwater modeling software (MODFLOW-2000) for use in conjunction with baseline data sets developed through the CDSS (see Modeling Data
- Provides links to download modeling software and related documentation
- Provides existing data sets developed for the Rio Grande Basin (Division 3) as part of the Rio Grande Decision Support System (RGDSS)
- Will provide data sets for groundwater modeling in the South Platte Basin upon completion, as part of the South Platte Decision Support System (SPDSS)
- Download RGDSS data sets for groundwater model in the San Luis Valley
Mixed Station Model
The USGS Mixed Station Model, which has been enhanced for CDSS, has historically been used in the development of StateMod models to automate the filling of missing baseflow data through monthly and annual regression relationships. Note that TSTool is being enhanced to include the functionality of the Mixed Station Model for use with future modeling updates.
- Baseflow data filling is carried out more or less automatically
- Has ability to fill many series, using data from available stations
- Many stations can be used to fill one time series, but only one station is used to fill each individual missing value
- Fits each combination of dependent and independent variable with a linear regression relationship on log-transformed values, using the common period of record
- Selects for each point to be filled the regression that yields the least standard error of prediction (SEP) among eligible correlations.
- Fill missing baseflow data during the development or update of a StateMod model