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... . . . . . . . . . . . . . . . . . . . . . . . . . I I I I I I' I I I I I . . I I I I . These water demands will be met from a variety of water supply sources that vary significantly between the different water providers. In Appendices 2A through 2K of this study, a detailed description of each water provider's current water rights and water management strategies is described. Future water projections by source have been prepared to identifY how much each district might rely on the available water sources. Each district's reliance on non-tributary ground water pumping has been identified separately. This information was used to determine regional ground water declines over the study period so pumping heads and well productivity could be estimated. This information is used to project future capital needs and operating costs for the districts if they rely on locally available water resources. This also provides a benchmark against which the economics of alternative water management strategies will be compared. A review of historic water use patterns identifies the distribution of water demands throughout the year. This distribution is seen in Figure 2.5 and represents the composite averages of historic water demands for Centennial, ECCV, Stonegate, Castle Rock, and the Pinery. This distribution of water demands is assumed to be representative of future water use patterns as well, and was used to assess water demands throughout the year in this study. Figure 2.5 Annual Water Demand Distribution 18 . " 16 .. S 14 . QI Q 'OJ 12 " " 10 " -< ... 8 0 QI 6 ClIl " - " 4 QI " .. QI 2 ~ 0 Jan Feb Mar Apr May June July Aug Sept Oct Nav Dec Month Page 2-10