| OCR Text |
Show Final Report Hydrologic Model Analysis of the Provo River Basin 3.0 ANALYSIS OF FLOWS, STORAGES, AND WATER SUPPLIES UNDER HISTORIC CONDITIONS This section presents a brief summary of the results of the historical modeling scenario simulated with PROSIM. A more complete presentation of these results is included in the draft Technical Memorandum - Preliminary Simulation Results, Historical Calibration Scenario ( CUWCD, 1994a). The data and assumptions used in modeling the historical condition, and selected streamflow, reservoir content, and river diversion results are presented below. 3.1 Description of Historical Modeling Data and Assumptions The hydrological, river demands, and meteorological data used in the historical scenario were developed as part of the Provo River and Weber River hydrologic analyses, documented in CUWCD 1993a and CUWCD 1993d. Diversion/ demands data reported by the River Commissioner's reports were subdivided in some cases, where only lumped user results were available. Historical diversions were assumed to equal historical demands. Demands that were not satisfied by direct flow rights were satisfied by reservoir calls, if the user had reservoir storage available. Water rights and operational rules data and assumptions were developed as part of the Provo and Weber river water rights analysis, as documented in draft Technical Memorandum # 3 and draft Technical Memorandum # 6, CUWCD 1993b and CUWCD 1993e. Water rights for most Provo River direct flow water users were increased significantly during the calibration process, to eliminate simulation discrepancies where water users apparently diverted more water than their entitlements. Reservoir operational rules ( especially those pertaining to Deer Creek Reservoir) were modeled as accurately as possible given the complex and varying criteria used during the 30- year simulation period. Deer Creek Reservoir ( PRWUA) ownership accounts and calls, and holdover and carryover rules were simulated. Historical data were used in simulating Weber- Provo, Duchesne, and Strawberry transbasin diversions. A maximum monthly limit was developed from historical data and used to control the storage of Provo River water in Deer Creek Reservoir. Excess Weber- Provo diversions, above those needed to fill Deer Creek Reservoir, were diverted to Utah Lake for exchange back to Deer Creek in subsequent years. The following historical PRWUA operations were not specifically simulated: extra allotment releases, power generation releases. January 1998 Page 22 |
