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CRDSS <br />TASK MEMORANDUM 2.09-13 <br />Consumptive Use Model <br />Non-Irrigation (Other Uses) Consumptive Uses and Losses <br />in the Dolores and San Juan River Basins <br />1.0 ISSUE <br />This task memorandum formalizes the computati on of non-irrigation categories such as livestock, <br />stockpond, municipal, thermal electri c, mineral resource, export, fi sh and wildlife, and recreation <br />categories for the CRDSS consumptiv e use (CU) in the Dolor es and San Juan River Basins for calendar <br />years 1985 to 1990. These categories are the same as those included in the USBR Colorado River <br />System Consumptive Uses and Losses Report (USBR, 1991) produced every five years. <br />2.0 DISCUSSION/ANALYSIS <br />The estimation of the non-irrigation consumptive uses and losses from the entire Dolores and San Juan <br />River basins can be performed either by county (Arc huleta, Hinsdale, La Plat a, Mineral, Montezuma, <br />Dolores, Mesa, San Miguel, San Juan and M ontrose) or by hydrologic unit (HUC) (14080101, <br />14080102, 14080104, 14080105, 14080107, 14080201,14080202, 14080203, 14030001, 14030002, <br />14030003 and 14030004). The US Bureau of Reclamation (U SBR) used the intersection of counties and <br />Hydrologic Units as the subdivisions for the crop consumptive use in its Colorado River System <br />Consumptive Uses and Losses Report, 1981-1985 (USBR, 1991), but for some of the other uses (e.g. <br />thermoelectric, mineral) they used either county or HUC depending on the available data. <br />To preserve consistency with these published reports and the units of the source data, other use data <br />are reported in Hydrologic Units, County (calculated), or the intersection of County and Hydrologic <br />Unit. County data are determined based on GIS data showing the percentage of each county <br />contained in the Dolores and San Juan River Basins. <br />2.1 Livestock <br />As in (USBR, 1991) three types of livestock are included: cattle, sheep and hogs. Table 1 shows the <br />average daily water consumption of each livestock type. <br />For the years 1985 to the present, the County Agricultural Statistics (CAS) no longer reports the <br />number of livestock by county, instead it records this information for the entire state of Colorado. <br />Therefore, the US Census of agriculture was used. <br />This census is conducted every five years. The census data for 1982, 1987, and 1992 were used, these <br />data can be obtained from the US Census world wide web page at http://sasquatch.kerr.orst.edu/ag- <br />stateis.html. <br />Using linear interpolation, values for the years 1985-1990 were calculated. The calculated numbers for <br />each county were distributed by sub-basin based on the area (obt ained from GIS) of each county <br />contained in the Dolores and San Juan River Ba sins (Archuleta 95%, Dolo res 100%, Hinsdale 27%, La <br />1 <br />01.21.97 12.09-13 IDS/CSU <br />