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<br />001633 <br /> <br />The change <br />necessary. <br />guidelines <br />readab 1 e. <br /> <br />is reviewed by D-755 and further testing is made if <br />The code is modified if necessary to conform to the <br />developed for keeping the code consistent and easily <br /> <br />_ The change is incorporated into the CRSS "current" versions. A <br />copy of the CRSM Change File Documentation is sent to members <br />of the Technical Management Team with a date on which the <br />change is placed in the current versions. <br /> <br />_ Before October 1, the steering committee approves all changes <br />made during the year. The model is tested and results are com- <br />pared to model results from 1 year ago. <br /> <br />_ On October 1, the changes are permanently <br />creating a new set of official versions. <br />purged. New current versions are created <br />submitted during the year. <br /> <br />placed in the model <br />Current versions are <br />as new changes are <br /> <br />2.4.3 Studies for Outside Users <br /> <br />Studies using the CRSS can be performed by members of the Technical <br />Management Team for other Bureau of Reclamation offices, Federal and <br />state agencies, and other interested parties, as time permits. <br />Charges for these studies will include staff costs, computer costs, <br />and output costs. For more information contact one of the CRSS coor- <br />dinators listed in section 2.2. <br /> <br />2.5 Computer Requirements and Costs <br /> <br />The CRSM and supporting programs are set up to run on a CDC (Control <br />Data Corporation) Cyber 170/855 computer. On this 60-bit word machine, <br />the CRSM requires approximately 310,000 octal words of field length to <br />execute. A single-trace 60-year run takes approximately 50 central pro- <br />cessor seconds to execute. The complete package of programs and data <br />bases consists of 2.6 million characters of information. <br /> <br />The cost of a study varies depending on the number of scenarios that are <br />studied and the number of hydrologic traces and depletion schedules that <br />are imposed on each scenario. The number of years in the study period <br />and the type of output also affect the total cost. A small study con- <br />sisting of 1 scenario, 1 depletion schedule, 15 hydrologic traces, <br />plotted output, and taking about 2 weeks to complete would cost approxi- <br />mately $3,000, which includes both labor and computer costs. A larger <br />study consisting of 10 scenarios and taking up to 2 months to complete <br />would cost approximately $15,000. These costs do not include any writ- <br />ten report. The large 1984 special study "Colorado River Alternative <br />Operating Strategies for Di stri buti ng Surpl us Water and Avoi di ng Spi 11 s" <br />cost approximately $150,000. This study required development of new <br />operating strategies, a formal report, and took 24 staff-months to <br />complete. <br /> <br />7 <br />