BOARD00123

• Board Meeting Date: 1/27/2004
• Description: WSP Section - Statewide Water Supply Initiative ‎(SWSI)‎ Status Update
• Board Meetings - Doc Type: Memo

DRAFT Preliminary Water Demand Forecasts .

pattl'rns. StateCU may be applied in a more genl'ral fashion to obtain crop irrigation .
watl'r requireml'llb if a statl'widl~ climate data set is compll'ted by thl" state and
consultants in a reasonable timdrame. Otherwis.e. historic din'rsions and
groundwater pumping estimates have been llsed to estimate the historic water
application using awragl~ system efficiencies. bpected irrigation water requirl'mt'nts
and consumpti\'e tlse willlhen bl' dl'rin:>d using thi:-; information and dl.\.t'!oped crop
coeffidl'nb from the CDSS basins.

Summary of Demands

Table 3 represents the preliminary l~!imate of 2000 gross di\"tcorsions for agricultural
uses per basin. These gross dl'mands rl'prl'St'nt the total watt~r used and not tIll'
amOtmt consumed. ~l&l consllmpti\"l' use numbers Me currently undl'r development
and will be combilll'd \\'ith agricultural consllmptin' use to dl'\'elop an l'stimit!e of
total consumpti\'l' lIses by basin.

Table 3 Preliminary Estimate 01 Gross Agricultural
Waler Demands 2000 b Basin

Ar1l.ansas
Colorado
Dolores/San Juan''San MI uel
Gunnison
North Platte
Rio Grande
South Platte
Yam a"Nhile/Green
TOlal

1,770.000
1,990.000
810,000
1.730,000
397,000
1,090,000
2.100,000
630.000
10,520,000

Figurl' 2 shows the percl'ntagl's of
estimated statewide M&L self-
supplied. and dgricultural \\'atef
demands fOf year 2000. Agriculture
currelltly represents 89 percent of the
total or gross water lise, As ~,1&1
demand increasl's and irrigatl'd acres
renhlin constant or dt'c1ine, till'
pl'rCl'ntage of itgricultural wilkr liSt' as
total water use in thl' statl' will dt'c1int.'.

.

9%

"'M&I

.. Self-supplied
~ Agricultural

89%

Flf)ure 2 Starewide Gross Water Demands 2000

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