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Last modified
1/26/2010 3:12:58 PM
Creation date
10/12/2006 4:20:26 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8441.400
Description
Colorado Big Thompson Project - Reports
State
CO
Basin
South Platte
Water Division
1
Date
8/1/1986
Author
Colo. Water Resource
Title
Summary Report - Preliminary Hydrologic Analysis
Water Supply Pro - Doc Type
Report/Study
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<br />" <br /> <br />r' <br />;~ <br />k, <br />"fr:i <br />10 <br /> <br />., <br /> <br />I <br /> <br />,",: <br /> <br />I <br />" <br /> <br />I <br /> <br />.::;; <br />/;,i <br />~ .. : <br /> <br />I <br /> <br />I <br /> <br />r <br />?' ",~" <br />, , <br /> <br />Table 4. 2 shows . the estimatiEld. present level of. irrigation demands <br />in the Colorado River. Basin above Cameo for the ;maj or segments of <br />the basin. Also shown on Table 4.2 are the average, irrigation <br />efficiencies atwhioh the irrigation rights in each seglilent of the <br />basin were operatiEld. These .efficiencies represent the. amounts of <br />depletion of the'streamflows in terms of perCent of the di.versions. <br />The average annual use of watiElrf.or. irrigation in the Colorado <br />River Basin ab.ove Cameo has not changiEld:signi,ficantly over the 33- <br />year study period. <br /> <br />It is estimated that municipal water use in the basin has doubled <br />durin<;j'the span of the 3$-yearstudyperiOd,oased on analysis of <br />reCorded' d.iversions. "'Municipal water use" in this analysis <br />inClU,des asa minor component, some industrial water uses that are <br />associated with mining. Table 4.3 indicates the estimated average <br />annual municipal demands by five-year increments during the study <br />period. A total aggregate demand of 38,700 .af per year was <br />operated in the Existing Level Use Soenario for all years. <br />Consumptive depletions of diversions for municipal uses varied from <br />20 to 100 percent depending on the location and n"ture of the <br />demand. <br /> <br />'I i 4 . 3 FUTURlt LEVEL USE <br /> <br />:.;1 <br /> <br />"./. <br /> <br />.1 <br /> <br />;- -~ <br /> <br />'l <br /> <br />... r <br /> <br />r <br /> <br />'r> <br /> <br />\) <br />or <br /> <br />f.... <br /> <br />" <br /> <br />The two future level operating scenarios consisted' of increasin<;j' <br />the demands. of certain existing projects and adding presently <br />undeveloped conditional projects to the Existing Level Use Scenario <br />to produCe target levels of .water demand under projected moderate <br />and high levels of future development in the basin. The projeots <br />to be expanded. and developed in the future and the target levels o,f <br />demand were established by the Authority . in oonsultation with. the <br />DWB and the CRWCD. <br /> <br />Table 4.4 lists the additional projects and expansion of existing <br />prqjects operated in the two Future Level Use Scenarios along with <br />their additional aVerage annu,al depletionsi;lbove the Existing LeVel <br /> <br />4-4 <br />
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