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'i 0 0 1 0 7 3 " Calibration Log The following chronological listing documents changes to the model proration factors, operational rights, irrigated acres, efficiencies, and other variables during the course of calibration. The Statemod calibration procedures and criteria were develped in the following document. Statemod Calibration Procedures and Criteria Calibration log entries in general begin with a date, then a description of the model change or whatever. An X before the date means that issue has been resolved, Simulate basin using historic diversions as demands . X 05-30-95 Changed the proration factor at Stillwater Reservoir from 0.167 to 0,33, Compared some historic data at USGS gage 09236000, Bear River near Toponas, to the flows measured at 09237500, Yampa River near Oak Creek. The historic flow at 09236000 is historically about 33% of the flow at 09237500, . X 05-31-95 Stillwater and Stagecoach overfill in winter and drawdown too much in summer. Both reservoirs historically accrue very little in the winter months. Currently statemod uses a single proration factor to distribute gaged flows to upstream points. Because only one value is used, it will tend to distribute the correct volume in the spring and too much water in the winter months, Currently there is no way to account for this, In the future maybe a seasonal proration factor may be employed, Checked evaporation and numbers seem wrong. In Stillwater for example the reservoir contains 3000 ACFT in June and the evaporation for that month is 1000 ACFT. I will check all input regarding evaporation and give RayB a call. Solution Ray Bennett's fix. Wed. 31 May 1995 . 06-01-95 Noticed funny looking numbers associated with the Allen Basin Supply Ditch (580506), This is a carrier ditch that should be driven by storage demand at Allen Basin Reservoir. It is currently in the operations file as type 11, Talked to Ross Bethel and Ray Bennett about whether to tie the carrier