Laserfiche WebLink
3.0 CONCLUSIONS AND RECOMMENDATIONS <br />The precision of estimating the irrigated acreage in each hydrological unit is a very important factor in <br />computing the irrigation consumptive water use in the Colorado River basin. Based on the discussion <br />with the USBR, the CRDSS CU Team developed a method of subdividing irrigated acreage by county <br />into hydrologic units, as given by CAS using GIS 1993 data, in the Gunnison River basin. Two methods <br />were proposed, implemented, and tested. The approach that preserves the GIS 1993 crop types and <br />acreage was adopted and implemented for estimating the irrigated acreage from CAS for the years 1985 <br />through 1990. Also, consumptive water use for the estimated acreage was calculated using the CU <br />model for each hydrologic unit in the basin. This method increases total irrigated acreage in the <br />Gunnison River basin. Care should be taken when using the values developed by this method because <br />there is no means available to the CRDSS to verify this with historical data. <br />4.0 REFERENCES <br />U.S. Bureau of Reclamation. Colorado River System Consumptive Uses and Losses Report, 1985-1990 . <br />Data files for the years 1985-1990. <br />Colorado Department of Agriculture (1985-1993). Colorado Agricultural Statistics (CAS). <br />5.0 SUPPORTING MATERIALS <br />Table 1 presents a comparison between the county irrigated acreage for the listed by the CAS and the <br />used by the USBR in preparing the Colorado River System Consumptive Uses and Losses Report, 1985- <br />1990 . <br />4 <br />A 275 01.09.95 1.14-19 Al-azzawe <br />