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Bay-Delta Office
Department of Water Resources

1416 9th Street,
Sacramento, Ca 95814

Mailing Address:
P. O. Box 942836,
Sacramento, Ca 94236-0001

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 CalLite: Central Valley Water Management Screening Model

(Web Site Last Updated: November 05, 2014)

CalLite: Central Valley Water Management Screening Model


The California Department of Water Resources (DWR) and the U.S. Bureau of Reclamation Mid-Pacific Region (USBR) have developed CalLite as an interactive screening model for evaluating various Central Valley water management alternatives.  CalLite simulates the hydrology of the Central Valley, reservoir operations, delivery allocation decisions, delta salinity, and habitat-ecosystem flow indices over an 82 year planning period. CalLite maintains the hydrologic, operational and institutional integrity of  CalSim; the results obtained from a typical CalLite run (<10 minute run time) are within 1% of a corresponding CalSim run (30 minute run time).

CalLite is designed for use in a variety of stakeholder processes for improved understanding of water system operations and potential future management changes. CalLite’s short run time and accessible graphical user interface (GUI) allow it to bridge the gap between more detailed system models and policymaker/stakeholder demand for rapid and interactive policy evaluations. Moreover, CalLite can be iteratively run in batch or manual mode to assist in the screening of a broad range of water management options and to educate decision makers on system responses.

CalLite uses the Water Resources Integrated Modeling System (WRIMS) software developed and maintained by DWR and USBR. The latest CalLite model uses WRIMS Version 2.0. CalLite code was written using Water Resources Simulation Language (WRESL), a flexible language interface to the linear programming solver and the database. WRIMS is used to compile the WRESL code and to run the CalLite model. An interactive Java-based GUI has also been incorporated as a means for the end-user to easily create scenarios, run simulations and view results. The CalLite development team has packaged all the necessary executables, libraries, and tables into the downloadable installer – users may simply install the software and run the model without purchasing any additional software or license. DWR and USBR will contact you if a license renewal or CalLite code update is necessary.

Current CalLite Version

  • Version 3.00 (Beta) (Released November 07, 2014)
  • Version 2.01 (Released February 22, 2012)
  • Version 2.00 (Released October 14, 2011)
  • Version 2.00(Beta) (Released August 29, 2011)

CalLite is copyrighted by the State of California Department of Water Resources. It is licensed under the GNU General Public License. This means it can be copied, distributed, and modified freely, but you may not restrict others in their ability to copy, distribute, and modify it. See GNU General Public License for more details.

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