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Results <br />•The alfalfa fields in the area had a maximum ETa value of 1,748 <br />mm/yr. <br />•The alfalfa ET for the Blythe weather station from the California <br />Irrigation Management Information System (CIMIS) is 1,774 mm/yr <br />which is only 1.5% more than the annual ET estimated by the <br />calibrated ReSET model. <br /> <br /> <br /> <br /> <br /> <br />•For all crops in the study area (92,492 acres) the currently used <br />approach overestimated the annual crop water use by 16% <br />(70,925,206 m3 or 57,500 acre-feet) compared to the ReSET-Raster <br />estimates. <br /> 16 <br />Run Type <br />Annual ET from <br />ReSET Model <br />(mm/yr) <br />Annual ET from <br />LCRAS Report <br />in (mm/yr) <br />Difference (%) <br />Un-calibrated 1,612 1,774 -9.1% <br />Calibrated 1,748 1,774 -1.5% <br />Table 1. Comparison between the maximum annual alfalfa ET estimated by ReSET and the <br />LCRAS Report