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• For explicitly modeled irrigation and M&I structures, the DMI demandts accesses the <br />CRDSS database for historic diversion records. Missing monthly values were filled with <br />the average diversion if the structure existed during the study period or zero if it had not <br />been constructed. <br />• For aggregated irrigation structures, the DMI demandts reads a consumptive irrigation <br />requirement estimate and basin wide system efficiency to develop an estimated historic <br />diversion time series. <br />• For aggregated M&I diversions, historic diversions were estimated to equal their estimated <br />depletion since they are modeled with an efficiency of 100%. <br />Phase IIIa enhancements which impact the historic diversion file include the addition of 16 <br />aggregated diversions, 6 explicitly modeled structures and 1 aggregated municipal diversion. <br />Appendix D, Section D.9 describes these Phase IIIa enhancements. <br />4.2.4 Direct Diversion Demand File - whiteH.ddm <br />The whiteH.ddm file contains monthly direct flow demands for each structure modeled in the White <br />Model. For the historical data set, demands were estimated to equal historical diversions. Chapter 5 <br />describes how demands were estimated for the calculated and baseline data. <br />Phase IIIa enhancements which impact the direct diversion demand file are associated with the <br />addition of 16 aggregated diversions, 6 explicitly modeled structures and 1 aggregated municipal <br />diversion. Appendix D, Section D.9 describes these Phase IIIa enhancements. <br />4.2.5 Direct Diversion Right File - whiteT.ddr <br />The whiteT.ddr file contains water rights information for each structure in the direct diversion station <br />file, whiteT.dds. Table 4.2.Sa presents the administration number and decreed amount for each <br />structure modeled. They were determined for different structure types as follows: <br />• Explicitly modeled irrigation and M&I water rights were taken from the CRDSS database <br />and correspond to the State Engineer's official water rights tabulation <br />• Free water rights, with an extremely junior administration number of 999999.00000, were <br />added whenever historic diversions were observed to exceed decreed rights during <br />calibration. <br />• Aggregated irrigation rights were assigned a weighted administration number for each of 8 <br />water right classes based on water rights associated with an aggregated group and their <br />decreed amount tabulated in the CRDSS database. Water right classes were determined <br />using historic call information and incremental right sizes (see Appendix D, Section D.5). <br />• Aggregated M&I water rights, modeled as a depletion, were assigned an amount equal to <br />their depletion and assigned a very senior administration number of 1.00000. <br />Phase IIIa enhancements which impact the direct diversion right file include the addition of 16 <br />aggregated diversions, 6 explicitly modeled structures and 1 aggregated municipal diversion. <br />Appendix D, Section D.5 describes these Phase IIIa enhancements. <br />Diversion <br />4-8 <br />