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<br />~ <br /> <br />. <br /> <br />~ <br /> <br />. . <br /> <br />, <br /> <br />, <br /> <br />" <br /> <br />" <br /> <br />~. <br /> <br />,'. '. <br /> <br />.... <br />,.... <br />'-Q <br />c;tJ <br /> <br />construction, those authorized for construction or those with an approved <br />environmental impact statement (EIS) as of 1976. The expected depletions ar~ <br />expected salinity butions from various Water and Power Resources Service <br />projects are summarizecl in Table I. <br /> <br />lveather modification programs will potentially augment Upper Basin water <br />supplies by an estimated 62,000 ha-m or more per year (USDI, BR, 1979a). <br />Groundwater supplies can also be utilized as an interim or conjunctive supply <br />source although the constraints of "Water quality and streamflow depletion <br />effects must De considered. Most of the future demands and further use of <br />Upper Basin Compact allocations will require substantial additional surface <br />storage facilities. <br /> <br />In the case of energy development and in many other industries, the <br />transferrecl water is generally totally consumed onC:site,therefore, the salin- <br />ity detriments are limitecl to concentrating effects due to the reducecl amount <br />of water available for c1ilution. The high salt loading component from the <br />irrigated lancls is eliminated. . <br /> <br />Storage <br /> <br />5 <br />There is more than 5.2 x 10 ha-m of storage available in the Upper <br />Colorado River Basin. Table A-3 in Appendix ,Alis.ts the major irrigation and <br />power reservoirs. However, there are a great many livestock water retention, <br />recreational and murticipal reservoirs, which are not -listed. Ho'st or the <br />unlisted reservoirs and lakes are very small, altho',gh some, such as Dillon <br />Reservoir (Denver, COloraclo, municipal water supply) are quite large. As of <br />1965, Shafer (1971) indicated a total of 208 reservoirs with an active capacity <br />of 403,540 ha-m had been constructed. Since then the amount of storage capac- <br />ity has been increased by more than 100,000 ha-m through the completion of <br />Navajo, Curecanti and other projects. <br /> <br />Grol).nd~vater <br /> <br />The small role of grouncl"Water in the Upper Colorado Rivar Basin has <br />primarily been one of furnishing domestic and livestock ne,eds. Groundwater <br /> <br />21 <br /> <br />-,~ <br /> <br />r, <br /> <br />~ <br />., <br /> <br />"l: <br /> <br />.:'-", . <br /> <br />" <br /> <br />. <br />