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<br />000050 <br /> <br />RECOMMENDATION FOR <br />CRDSS WATER RESOURCE PLANNING MODEL <br />ST A TEMOD VS. MODSIM <br /> <br />Prepared by Ross Bethel <br />Febmary 16, 1995 <br /> <br />BACKGROUND <br /> <br />During a four month discovery and evaluation phase in early 1994, seven river basin simulation <br />models were evaluated by the CRDSS consulting team for their ability to meet the goals and <br />objectives of the CRDSS water resource planning model (WRPM), Two levels of evaluation <br />criteria were established. The first level included model availability, status of documentation, <br />and fundamental functionality, A second level of criteria focused on technical functionality, user <br />compatibility, performance, and flexibility for the water resource planning issues contemplated <br />for CRDSS, <br /> <br />In May, 1994, the consultant team "concluded that the model MODSIM best meets the overall <br />CRDSS objectives." The Department of Natural Resources CRDSS management team (DNR <br />team) subsequently adopted the consultant team recommendation that MODS 1M be used as the <br />foundation for the CRDSS water resource planning models. <br /> <br />During the last nine months, the consultant team has been developing the WRPM prototype for <br />the Gunnison River Basin using the MODS 1M model. This effort has consumed more time and <br />resources than expected. <br /> <br />Since July, 1994, the DNR team has expressed a number of concerns to the consulting team <br />about the usability, functionality, performance and completeness of the early prototypes, In mid- <br />October an early release of the Gunnison Basin prototype was made available to the state, <br />Following review of the October prototype, the state decided it needed a tool to confirm proper <br />operation of the complicated modeling environment of the prototype, A secondary purpose was <br />to provide an optional modeling environment in the event that the MODS 1M implementation was <br />not successful. An effort was initiated by the DNR team to adapt the data developed for the <br />Gunnison Basin prototype to another model. The alternative model selected was the version of <br />the BESTSM model developed and applied hy Boyle Engineering in the state study of the Green <br />Mountain Pumpback Project in the late 1980's. This BESTSM model was a runner-up to <br />MODS 1M in the May, 1994 model recommendations. Ray Bennett of the Division of Water <br />Resources was given primary responsibility of implementing a version of the Gunnison River <br />Basin prototype using the BESTSM model. <br /> <br />FIRST YEAR WRPM WORK PRODUCT <br /> <br />At the formal conclusion of the first year of development on January 10, the consultant team <br />