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Livestock <br />A standard amount of livestock consumptive use will be estimated based on the number and kind of <br />livestock in a given area. The actual consumption factor used by the USBR Methods Manual that will be <br />used by the consumptive use model is in gallons/head/day (ghpd). <br />Stock Pond <br />Stock pond consumptive use is an estimate of water loss through evaporation from stock ponds. This <br />value comes from considering the evaporation characteristics that can be expected from a stock pond <br />with a given surface area. <br />Estimating Consumptive Use for Other Categories <br />Other consumptive use categories may not be significant with respect to consumptive use total amounts, <br />but they are significant because of economic, political, and legal factors. Some of the water use and <br />consumptive use data will be available directly as diversion amounts; other categories will require <br />estimates based on human population in the case of municipal water use or will be based on reservoir <br />surface area in the case of unmeasured reservoirs. <br />Municipal <br />Where available, municipal diversion amounts will be included with estimates based on human <br />population in a given area. If possible, different data sources for diversion amounts will be used to <br />improve the methods to estimate water use from municipal areas. <br />Industrial <br />This category primarily includes two types of industrial uses: mineral resources and thermal electric <br />power. <br />Other Recreation <br />This category is currently not modeled, but may be included in later years. <br />Exports <br />There are two categories of exports, outside and inside the system. The outside system exports are those <br />that take water out of the Colorado River basin. The inside system exports are those that move water <br />between drainage systems. Export diversion are 100 percent consumptive. <br />Reservoir Evaporation <br />Reservoir evaporation calculates the evaporation loss from reservoirs by using the measured or estimated <br />net evaporation and the measured or estimated surface area. <br />2 <br />A275 01.09.95 1.14-1 CSU IDS <br />