Laserfiche WebLink
<br />e <br /> <br />e <br /> <br />e <br /> <br />3686-a/6 <br /> <br />of the upstream depletions. Consumptive use can be defined as <br />those flows diverted from the river and not returned to the <br />river. <br /> <br />a. <br /> <br />Agricultural <br />Historic irrigation depletions above the Webster Hill <br />Reservoir site were estimated using irrigated acreage in <br />the basin determined by the Colorado Department of <br />Agriculture and by computed consumptive use values. The <br />number of acres irrigated above the Webster Hi 11 Reservoir <br />site has not changed significantly in the last 40 years. <br /> <br />The annual depletions for irrigation above the site were <br />estimated to be 147,100 ac-ft for the 151,600 acres of land <br />being irrigated. The irrigation season typically runs from <br />May through mid-October, with the season being shorter in <br />the higher elevations. The crucial periods (i.e., those <br />with the highest consumptive use of water from the Colorado <br />River) are times of hot weather and little precipitation, <br />which occur in the late summer. Based on these conditions, <br />the annual irrigation depletions were distributed over <br />their respective irrigation months. <br /> <br />b. <br /> <br />Domestic, Municipal and Industrial <br />The domestic, municipal and industrial consumptive use was <br />est imated based on the U. S. Bureau of Census popu 1 at ion <br />data for the upstream counties (Garfield, Eagle, Pitkin, <br />Summit, and Grand) at 10-year intervals from 1940 to 1980. <br />The per capita consumptive use was estimated to be 0.05 <br />ac-ft/yr (44 gal/day) for domestic and municipal consump- <br />tion and three times that amount for industrial <br />consumption. The annual depletions for domestic, <br />municipal, and industrial uses were estimated to be <br />13,000 ac-ft. <br /> <br />II-3 <br />