Third Party Software

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
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.

Major Features:
  • 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
Common Uses:
  • 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
Downloads:
Name Description File Type Release Date
MODFLOW-CDSS A version of MODFLOW-2005 with modifications for Colorado's Decision Support Systems. Link 9/30/2011
MODFLOW-CDSS Report Report describing MODFLOW-CDSS, a three-dimensional, finite-difference groundwater-modeling program. Link 9/30/2011

MODFLOW-2000
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 section).

Major Features:
  • 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)
Common Uses:
  • Download RGDSS data sets for groundwater model in the San Luis Valley
Downloads:

Name Description File Type Release Date
MODFLOW- 2000 Principia version as enhanced for RGDSS project, produces key output files and is independent of graphical interface Zip 6/25/2005
MODFLOW- 2000 Release Notes Release notes for Principia version as enhanced for RGDSS project PDF 6/25/2005
MODFLOW-2000 w/Doherty Enhancement Doherty Enhancement version of MODFLOW-2000 Exe 01/23/2014
MODFLOW-2000 w/Doherty Enhancement - Source Code Source code for the Doherty Enhancement of MODFLOW-2000 Zip 01/23/2014

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.

Major Features:
  • 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.
Common Uses:
  • Fill missing baseflow data during the development or update of a StateMod model
Downloads:

Name Description File Type Release Date
Mixed Station Model A version of the USGS Mixed Station Model enhanced for CDSS Zip 9/28/1999
Subtask 11.10 Memo: Fill Missing Baseflow Data This memo documents the application of the Mixed Station Model in StateMod PDF 9/26/2011



IDS Alluvial Water Accounting System
IDS Alluvial Water Accounting System (IDS AWAS) is a river depletion model developed by the Integrated Decision Support (IDS) group at Colorado State University (CSU).

Major Features:
  • Uses the Glover method to calculate return flows
  • Relies on various user input data such as aquifer boundary condition, transmissivity, and distance to river and to alluvial boundary
Common Uses:
  • Calculate return flows associated with a historical CU analysis
  • Calculate recharge rates associated with a recharge facility
  • Calculate lagged depletions to the river as a result of well pumping