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The SEASONAL.TXT file, which c ontains the time-series data, including monthly consumptive <br />? <br />use values, and monthly values for net reservoir evaporation <br /> <br />The INFLOW.DBF, which contains time-series data for the natural inflows for the network <br />? <br /> <br />The BASELINE.NET file, which contains data for the GUNMOD network constructs and link <br />? <br />costs <br /> <br />The CRAMOUT.TXT file, which c ontains all of the physical ch aracteristics data including the <br />? <br />monthly irrigation efficiency values, the return flow lag patterns, irrigated acreage, and the <br />physical characteristics for reservoirs, includi ng maximum and minimum storage contents and <br />elevation-area-capacity relationships <br />Hydrosphere also provided a subroutine that enable d conversion of the State Engineer's Water Rights <br />Administration Numbers to appropriate li nk costs required by the network models. <br />Storage Targets <br />For the development of the MODSIM prototype, all small reservoirs in the network were assumed to have <br />storage targets equal to their maximum storage cont ent, such that the mode l will attempt to fill the <br />reservoirs at all times when their stor age rights are in priority and to the extent they have not exceeded their <br />fill entitlement for the year. For th e larger reservoirs, the adopted storage targets were derived from a <br />combination of sources. For Paonia Reservoir, th e GUNMOD targets were used without change. For <br />Ridgway Reservoir, the targets for the months Oc tober through March of each year were the same as <br />GUNMOD. Based on an analysis of the historic operations of Ridgway for 1988 through 1994, the targets <br />for the remaining months were adopted as fo llows: April 56,000 acre-feet , May 70,000 acre-feet, June <br />through September 84,400 acre-feet. For Blue Mesa and Taylor Park reservoirs, the operating targets were <br />difficult to establish due to the widely changing operations by the UVWUA and the operational policies of <br />the USBR that are still not well defined. For purposes of the initial calibration efforts, a procedure was <br />developed that considered the historic operations for the period 1970 through 1980 and established a set of <br />three targets for each month of the year (high, aver age, and low), depending on the type of runoff year <br />Mosaic <br />expected. These derived targets are described in the on-line documentation. <br />In the process of reviewing the GUNMOD data, a number of inconsistencies were identified that related to <br />the aggregation of water rights, the source of water for certain aggregated priority classes, irrigated acreage <br />values, erroneous data for the aggregated priority cl asses and other minor discrepancies. The majority of <br />these discrepancies were enumerated in a D ecember 13, 1994, memorandum provi ded to the CWCB. Many <br />of these discrepancies may have been corrected and/or addressed in the final version of GUNMOD. <br />Subtask 4 - MODSIM Development <br />The majority of the Phase IIa work effort was devot ed to implementing the MODSIM model as a prototype <br />for water rights planning in the Gunnison River basi n. The emphasis was placed on developing a modeling <br />tool that would be sufficiently gene ric to allow the model to be read ily adaptable to the remaining CRDSS <br />river basins. Hard-wired model constructs were avoi ded. The operation of the model is described in the <br />Mosaic <br />MODSIM Users? Manual, and the principal features and ope rations are described in the on-line <br />documentation for the model. The model logi c and solution theory are described in the MODSIM Technical <br />Manual . <br />3 <br />A 275 .01.09.95 1.15-26 Fosha <br />