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CRDSS <br />TASK MEMORANDUM 1.11-1 <br />Big River Model Coordination <br />1.0 ISSUE <br />The purpose of this memorandum is to document the progress being made by the U.S. Bureau of <br />Reclamation (USBR) on the Big River model replacement and the coordination that is taking place <br />between the CRDSS project team and the USBR. This memorandum will evolve as the USBR project <br />progresses. <br />2.0 DISCUSSION/ANALYSIS <br />The USBR is in the process of developing replacement models for the Colorado River Simulation <br />System (CRSS) and the Annual Operating Plan (AOP) models. The work will be performed as part of <br />the INTEGRAL project, which is a project jointly funded by EPRI, CADSWES, TVA, and USBR. The <br />project is described in a document titled ?Requirements for a Colorado River Policy and Planning Model <br />to Replace the Colorado River Simulation System? by Fulp, Harkins, Vickers, and Williams (all with the <br />USBR). <br />The USBR has proposed an aggressive schedule to complete the work. The schedule currently calls for a <br />prototype of the CRSS replacement model to be available for testing January 15, 1995. This date is <br />approximately 1 month later than the originally scheduled completion. The program is being developed <br />on a SUN workstation. The USBR has said that SGI will be one of the first platforms to which the <br />software is ported. A prototype of the 24 Month Study Model is due to be completed by mid-1996. <br />Work on this task began with a review of the Requirements Analysis in February 1994. In April the <br />USBR established the User Involvement Group (UIG) to enable potential users of the programs to review <br />the project progress. The CRDSS project team is being represented through Ross Bethel, Ray Alvarado, <br />Ray Bennett, and Larry Brazil, who participate in the meetings. Meetings have been held in Las Vegas <br />on April 27, June 21, August 30, and November 8. Future meetings will be held every 6 to 8 weeks. <br />Several key milestones have been accomplished to date. The USBR project team evaluated several <br />software packages for use in the project. A decision was made to use TCL, a software development <br />environment that is efficient for rule production. All of the CRSS computation algorithms, such as <br />evaporation, bank storage, and energy, have been developed from the original FORTRAN. The CRSS <br />operation rules have been implemented. Input/output functionality will be similar to CRSS. SMDID <br />will be used initially to develop demands. Data management interface (DMI) routines will be developed <br />eventually to transfer information. <br />3.0 CONCLUSIONS AND RECOMMENDATIONS <br />The recommendation is to continue to participate in the USBR project as part of the UIG, and to evaluate <br />approaches and assumptions as information concerning the project design becomes available. Testing <br />and evaluation of the programs should begin as soon as the prototype is available. <br />1 <br />A275 01.09.95 1.11-1 Brazil <br />