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estimated that 6 percent of the historical diversion was lost to ditch seepage, 6 percent <br />was lost to ditch waste, 6 percent was lost to deep percolation, and 12 percent was lost <br />to tail water. <br />The recorded diverisons were proportioned based on the ratio of Peabody's acreage <br />and the total acreage under the J.C. Temple Ditch No. I (20.0 • 170.9 or 11.7 percent). <br />The water budget procedure was performed for 1969 through 1986. The results for an <br />avenge year, 1981, and a dry year, 1977, are summarized in Tables 9 and 10, <br />respectively. The average year and dry year were selected based on consumptive <br />irrigation requirements and the diversion records. The water budget shows that the <br />historical consumptive use was 36.1 acre-feet in 1981 and 40.3 acre-feet in 1977. <br />Historical Return Flows <br />As described above, a portion of the irrigation delivery is stored in the root zone <br />and consumptively used by the crop. The remainder of the diversion returns to Dry <br />Creek as tail water and as recharge of the underlying ground water. The tail water and <br />ditch waste return within a short time of the delivery. The recharge of the ground water <br />causes an accretion in streamflow to the adjacent stream, but in a delayed manner. The <br />stream accretion from recharge was estimated using a computer program developed by <br />based on the soils information, and bedrock materials. The results showed that <br />84 percent of the deep percolation returns to Dry Creek within 36 months of the <br />application. <br />The stream accretion factors estimated by the Glover method were incorporated in <br />the water budget procedure to show the total volumes of return flow. The return flow <br />during the irrigation season totalled 14.0 acre-feet in 1981 and 10.9 acre-feet in 1977. <br />The water deliveries and soil moisture content were insufficient To meet the consumptive <br />irrigation requirements in September and October of 1977. <br />PLAN FOR AUGMENTATION <br />To prevent injury to senior appropriators in the Dry Creek, Sage Creek and Yampa <br />River basins, Peabody should be prepared to replace its out-of-priority depletions through <br />II <br />the Colorado Division of Water Resources (1987, Schroeder), which incorporates the <br />"Glover method:' This method is appropriate for alluvial areas adjacent to streams. <br />Data requirements include transmissivity and specific yield of the alluvial materials, <br />distance from the stream, and recharge rate. Transmissivity and specific yield were <br />estimated to be 2,000 gallons per day per foot of drawdown and 15 percent, respectively, <br />