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<br />OOloJO <br /> <br />February 27, 1998 <br /> <br />radio buttons, etc.) which, if implemented by the State or others, could allow the historical <br />data extension to be performed in a user friendly manner. <br /> <br />Deliverables: <br />.. Gill Interface screen depictions with appropriate explanation <br /> <br />11.12 Colorado River Model Simulations <br /> <br />Primary Responsibility: Boyle <br /> <br />Historical Data simulation <br /> <br />In this subtask, the ColoupT data sets will be revised as appropriate and the model will be <br />executed with the extended data to confirm its operation and validate the calibration. <br />Historical demand files will be generated under this task, incorporating differences between <br />historical diversions and historical demands (reservoir feeder structures zeroed out, etc.) for <br />the entire period. <br /> <br />The model will be executed in baseflow mode to distribute gaged baseflows to ungaged <br />points. It will next be executed in simulation mode with the historical data set for the period <br />1929-1996. Results for 1975-1996 will be compared to Phase IDa model results and/or <br />historical records to determine if any additional calibration is required. It should be <br />recognized that calibration may be "upset" because simulated reservoirs may be at a different <br />level on October 1, 1974, than they were in the Phase IDa model. For 1929-1974, simulation <br />of key gages, large diversions, and reservoirs will be compared to historical data. The review <br />will be general, and is expected to confirm that our understanding of the system is correct. <br />The attached cost of services reflects 3 person-days for comparison and review of the <br />historical data set simulation, and any minor model changes that can be effected within that <br />time. <br /> <br />Calculated Data Simulation <br /> <br />The ColoupT model will be executed in simulation mode with the calculated data set for the <br />period 1929-1996. Calculated demand files will be generated under this task. Differences <br />between historical diversions and calculated demands (reservoir feeder canals and secondary <br />structures zeroed out, etc.) will be incorporated for the 1929-1974 period. Calculated <br />reservoir target files will also need to be extended, using whatever approach (capacity, <br />forecasting, or historical contents) was used in Phase IDa. If enlargement dates and pre- <br />enlargement capacities are known from current CROSS documentation, they will be reflected <br />in the target file, but additional research will not be done. Reservoir targets that differ <br />according to wet, dry, or average hydrologic conditions will be set according to the year <br />classification developed in Task 11.5. <br /> <br />The results of the calculated data simulation for 1975-1996 will be compared to Phase IDa <br />results and/or historical records. Results for 1929-1974 will be compared with historical and <br />differences noted. The attached cost of services reflects 3 person-days for comparison and <br />review of the calculated data set simulation, and any minor model changes that can be <br />effected within that time. <br /> <br />7 <br />