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14050005 (21,445 acre-ft), Rio Blanco (31,888 acre-ft), and HU14050005 (21,445 acre-ft), <br />respectively. <br />Table 6 shows the 6-year average annual IWR in terms of unit depth for each subarea. The average <br />value for the entire White River basin is 1.27 feet. The highest per unit depth IWR by subarea, is in <br />Rio Blanco 14050007 (2.19 feet), and the lowest is in Rio Blanco 14050006 (1.13 feet). <br />3.0 CONCLUSIONS/RECOMMENDATIONS <br />The 6-year average IWR for the White River Basin is estimated to be 32,502 acre-ft. The water <br />supply information should be considered directly when estimating the actual consumptive use. The <br />CRDSS consumptive use (CRDSS-CU) program has this capability. By linking CRDSS-CU to the <br />Water Resource Planning Model (STATEMOD), estimates of consumptive use are subject to the <br />actual availability of water supply. The results of this process are presented in Task Memoranda <br />2.09-05 - 2.09-08. Other uses (non-irrigation CU) are presented in Task Memoranda 2.09-10 - 2.09- <br />13 and total values for the entire Colorado River Basin are presented in Task Memorandum 2.09-20. <br />Depending on the level of detail desired, several different data sets can be prepared for estimating <br />IWR in the White River basin. Smaller subareas may be chosen to increase the representativeness of <br />the consumptive use data. For example, the growing season of a particular crop may not be uniform <br />across a subarea defined by HU and county combination, thus, breaking the subarea into smaller <br />areas would allow assigning a more representative growing season for each smaller area. Similarly, <br />when the weather parameters in a HU-county subarea are derived by weighting two or more weather <br />stations, it may be better to break the subarea into smaller areas such that each smaller area is <br />associated with a single weather station. <br />4.0 OTHER ESTIMATES OF CONSUMPTIVE USE <br />The CRDSS-CU model incorporates an enhanced version of the SCS Blaney-Criddle methodology <br />which includes a monthly soil moisture budget. This allows soil (i.e., water holding capacity, and <br />AWC) and management (i.e., management allowed depletion, MAD) characteristics as well as winter <br />soil moisture carry-over to be incorporated in the estimation of IWR. Using the enhanced version of <br />the CU model, new estimates can be obtained. <br /> 2 <br />11.26.96 12.09-02- IDS/CSU <br />