Laserfiche WebLink
CRDSS <br />TASK MEMORANDUM 1.15-9 <br />Water Rights Planning Model <br />Review of Hydrosphere Resource Consultants River Simulation Model CRAM <br />1.0 ISSUE <br />The purpose of this task memorandum is to generally describe the computer model CRAM and to <br />summarize the model's functionality related to the CRDSS project based upon the Level One <br />decision criteria presented in CRDSS Task Memorandum 1.15-2. In order for CRAM to be <br />considered as a possible candidate for the CRDSS water rights planning model, it must satisfactorily <br />meet the requirements of the evaluation criteria. <br />2.0 DISCUSSION/ANALYSIS <br />Background Information <br />CRAM is a privately owned computer model developed by Hydrosphere Resource Consultants. The <br />CRAM source code is proprietary; therefore, the model has not been available to the CRDSS Project <br />Team for review and evaluation as a possible water rights planning model. <br />Recent use of the CRAM model has been for the Gunnison River basin, in which seven agencies are <br />involved in an effort to develop a planning model for the basin: <br />U.S. Bureau of Reclamation (USBR) <br />? <br />Colorado Water Conservation Board (CWCB) <br />? <br />Colorado River Water Conservation District (River District) <br />? <br />Upper Gunnison River Water Conservancy District (UGRWCD) <br />? <br />Office of the State Engineer (SEO) <br />? <br />Tri-County Water Conservancy District (TCWCD) <br />? <br />Uncompahgre Valley Water Users Association (UVWUA) <br />? <br />CRAM has also been used by the City of Boulder to develop a river basin planning model of the <br />Boulder Creek basin and by the CWCB and River District for a planning model of the Yampa River <br />basin. The following review of the CRAM model focuses primarily on the general features and <br />capabilities of model version used for the Gunnison River basin project, as determined from a review <br />of the draft user documentation. <br />Basic Description of Model Operation and Function <br />CRAM is fundamentally a mathematical model which uses a network flow allocation solution <br />technique. In general, the river basin is described by a network structured as a system of nodes and <br />links. The mathematical solution of the network system is the allocation of flows that will satisfy, <br />for the entire network, the user specified constraints at each node and link. At each node and link, <br />mathematical equations are developed according to constraints established by the model user (such <br />as water right priorities, and reservoir and/or channel capacities). These equations insure that the <br />1 <br />A275 05.10.94 1.15-9 Fosha, Hyre <br />