CalSim II
The Water Resource Integrated Modeling System (WRIMS model engine, or WRIMS) is a generalized water resources modeling system for evaluating operational alternatives for large, complex river basins. WRIMS integrates a simulation language for flexible operational criteria specification, a linear programming solver for efficient water allocation decisions, and graphics capabilities for ease of use. These combined capabilities provide a comprehensive and powerful modeling tool for water resource systems simulation. The latest available version is 1.2.4b.
CalSim is the model used to simulate California State Water Project (SWP)/Central Valley Project (CVP) operations.
Together, WRIMS and CalSim replaced the Department of Water Resources' planning model of the State Water Project/Central Valley Project system, DWRSIM. Unlike DWRSIM, in which the engine and model were tightly coupled, the entire system and related operational criteria in CalSim, are specified as input to WRIMS and may be modified or replaced without requiring changes in WRIMS.
WRIMS and CalSim are products of joint development between DWR and Bureau of Reclamation.
CalSim Water Resources Simulation Model License
CALSIM is copyrighted by the State of California, Department of Water Resources. It is licensed under the GNU General Public License, version 3. 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 the license below for more details.
The CALFED Science Program invited Dr. Pete Loucks of Cornell University to organize and chair an expert panel for the review of CalSim 2 Water Resources Planning Model. In addition to Dr. Loucks as the chairperson, the panel consisted of Drs. A. Close (Murray Darling Basin Commission), W.M. Haneman (University of California, Berkeley), J.W. Labadie (Colorado State University), J.R. Lund (University of California, Davis), D.C. McKinney (University of Texas, Austin), and J.R. Stedinger (Cornell University). The panel published its final report on December 4, 2003, titled: A Strategic Review of CALSIM II and its Use for Water Planning, Management, and Operations in Central California.
- In response to the short-term and long-term improvements recommended in the December 4, 2003 CalSim 2 Panel Review Report, DWR and USBR staff developed a program to implement the major features of those recommendations according to a time line that met agencies priorities and model development goals. The agencies response plan was documented in an August 2004 report, titled: PEER REVIEW RESPONSE: A Report by DWR/Reclamation in Reply to the Peer Review of the CalSim 2 Model Sponsored by the CALFED Science Program in December 2003.
- In addition to the above general review of the CalSim 2 modeling features and capabilities, the CALFED Science Program and the California Water and Environmental Modeling Forum jointly sponsored and oversaw a review process of the CalSim 2’s updated modeling approach of the San Joaquin River Valley. The panel was chaired by Dr. J.R. Lund (University of California, Davis), and panel members were Dr. David Ford (David Ford Consulting Engineers), Mr. Les Grober (Central Valley Regional Water Quality Control Board), Dr. Thomas Harmon (University of California, Merced), and Dr. Daene McKinney (University of Texas, Austin). The panel published the results of its review in a January 12, 2006 Report, titled: Review Panel Report San Joaquin River Valley CalSim II Model Review.
- SWP Delivery Capability Report and Studies 2017
- SWP Delivery Capability Report and Studies 2015
Sample Study and Tools
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Contact Information
For general questions and comments, contact nislam@water.ca.gov
Include a brief description (10 words or less) of the bug in the subject field of the email. In the message body include the WRIMS version number, operating system, and a detailed description of the bug and the situation in which it occurred.