S5_11-15-04

• Basin: Statewide
• Title: SWSI Phase 1 Report - Section 5 Projected Water Use
• Date: 11/15/2004
• Author: CWCB
• SWSI - Doc Type: Final Report

Section 5
Projected Water Use
supplies, timing of deliveries, delivery losses, and
application efficiencies. The ability to use agricultural
water rights existing on the land to meet the needs of
M&I use as the land is developed is highly dependent
upon these factors, plus the need for a portion of the
water to be stored to meet non-irrigation M&I demands
and to provide for firm yield for below average runoff
years. These considerations are explained in greater
detail in Section 8.
5.2 Estimated 2000 and Projected
2030 M&I and SSI Use
Of the many factors affecting M&I water use, the
projected increases in population clearly drive the
increases in M&I use from 2000 to 2030. The effects of
Level 1 conservation result in a projected reduction in per
capita M&I water use of approximately 6 percent over
this 30-year planning period. This reduction is reflected in
the 2030 M&I water use projections presented in this
section. M&I and SSI water use projections presented in
this section represent the gross or total diversion
amount, as opposed to the consumptively-used portion
as described in Section 5.1.1.6.
To reiterate, M&I projections were developed by
multiplying the estimated (2000) or projected (2030)
populations by per capita demands for each of the state's
64 counties, then reducing water use associated with
Table 5-6 Su
Arkansas
Colorado
Dolores/San Juan/San
Gunnison
North Platte
Rio Grande
Yampa/VVhite/Green
TOTAL
~~
Level 1 conservation measures for the 2030 scenario.
These results were aggregated on a basin basis, as well
as on a subbasin basis for use in the water supply "gap
analysis" as presented in Section 6.
Overall, combined M&I and SSI gross water use is
~xp~ct~d to increase statewide by about 53 percent
(630,000 AFY) over 2000 levels by 2030, as shown in
Table 5-6. These projections do not include the impacts
of water conservation efforts beyond Level 1 that are
being implemented or planned by many M&I providers.
These future conservation efforts, as described in
Sections 6 and 8, are important strategies for meeting
future water demands. The increase in M&I and SSI
water use over this period by basin, and relative
(percent) increase over 2000 M&I water use, are each
presented in Figure 5-7. A summary of projected SSI
water uses by type of industry and by county is provided
in Table 5-7.
Similar to the population patterns described earlier in this
section, rates of M&I water use increases over the
30-year planning period are generally higher for the West
Slope basins than for the Front Range's South Platte and
Arkansas Basins. However, the bulk of the increase in
water uses in terms ofAFYwill be in the South Platte
and Arkansas Basins, which together represent about
80 percent of the total projected increase in Colorado's
gross M&I and SSI demands.
Gross Water Use for M&I and SSI in 2000 and 2030
61
500 600 600 - 100
17,400 23,100 21,700 1,400 4,300
72,400 1,250,800 1,182,100 68,700 409,700
101
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Statew~itle Water Supply Inii'iative
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