| 2015 RiverWare User Group Meeting |
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| NCAR/UCAR Center Green Campus Auditorium |
Tuesday, February 3, 8am - 5pm
Wednesday, February 4, 8am – 12:30pm
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| The Evolution of CRSS: From Cyber-Mainframes to High Performance Computing |
| Alan Butler, Carly Jerla, Ken Nowak and Jim Prairie - Bureau of Reclamation; Robert Lempert & David Groves - RAND Corporation; and Jim Leek - Lawrence Livermore National Laboratories |
The Colorado River Simulation System (CRSS) has been the Bureau of Reclamation’s long-term planning model since the 1980’s. The complexity of CRSS has evolved and run-times have decreased as computing power has increased. Advances in RiverWare have helped increase the user-base and transparency of the model by increasing the usability of CRSS, while other RiverWare improvements have helped reduced computational constraints. In 2006, thousands of CRSS simulations supported the development of the Colorado River Interim Guidelines for Lower Basin Shortages and Coordinated Operations for Lake Powell and Lake Mead. In 2012, hundreds of thousands of simulations were performed to support the Colorado River Basin Water Supply and Demand Study (Basin Study). The orders of magnitude increase was required for the scenario planning approach employed by the Basin Study and made possible by both increases in computing power and the continued enhancements of RiverWare; however, the run-time for this effort was considerable and limits feasibly conducting such analyses on a regular basis.
Recently, a project conducted by the RAND Corporation and Lawrence Livermore National Laboratories, with support from CADSWES and Reclamation, demonstrated the ability to run RiverWare at a high performance computing facility, i.e., on a “supercomputer”, which reduced Basin Study scale runtimes from days to minutes. The project provides a glimpse of one potential tool for decision support modeling, though several technical limitations had to be overcome during the project that would necessitate additional RiverWare development before a supercomputer could be routinely utilized to perform RiverWare simulations . |
| Click HERE for a PDF version of the presentation slides. |
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