WSP02976

• File Number: 8271.300
• Description: Colorado River Basin Salinity Control Program - General Information and Publications-Reports
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 12/1/1979
• Title: An Economic Evaluation of the Salinity Impacts From Energy Development - The Case of the Upper Colorado River Basin
• Water Supply Pro - Doc Type: Report/Study

Table 3. Summary of irrigation water use by aggregated subareas (ASA).

1969
175 Assessment WRC Frame- Salinity Ag Census
Item/ASA Study Hyatt, et a1 work study forum Class 1-5 land
W [22] [10] [20] [4] [15]
1'-:l
l-^'I, I rri gatedbAreaa (acres x 103)
0 1401 653 597.6 660.2 691. 4
1402 490 570.4 583.9 472.4
1403 222 247.4 253.0 174.8
Total 1365 1415.4 1497.1 1338..6
Water Withdrawals (AF x 103)
1401 4177 .2 2352.8
1402 2819.6 3378.2
1403 1539.4 1012.2
Total 8536.2 6743.2 5-7000
Consumptive Use (AF x 103)
1401 835.9 1015.0 818.4 1524.7
1402 940.2 1100.0 931.6 1354.5
1403 385.0 501.0 377.8 448.2
Total 2161.1 2616.0 2127.8c 2175.0 3327.4
Withdrawals (W) and Evapotranspiration (ET) in acre feet per acre
W ET W ET JoL ET JoL ET W -1L
1401 6.4 1.3 3.9 1.7 1.2
1402 5.8 1.9 5.6 1.9 N/A 1.6 N/A N/A
1403 6.9 1.7 4.8 2.0 1.5
AVERAGE 6.3 1.6 4.8 1.9 1.4

a1n an average year there is estimated to be 124,400 acres of idle land which is not included

bASA 1401,1402, and 1403 are referred to the Green River, the Colorado River Main Stem, and the San Juan
River Drainages respectively and the ASA numbers are different from WRSA numbers used in this study

cIncludes incidental use and irrigation reservoir evaporation

are exports of water out of the basin to
provide supplies to the large population
centers on the east slopes of the Colorado
Rockies and the Wasatch Front in Utah, and
evaporation losses from main stem reservoirs
of the Colorado Storage Project System.

Studies estimating the consumptive use
for these various activities are in general
agreement as to the magnitude of total
depletions in the basin. The quantities are
usually presented by state or by water
resources ASAs and are, therefore, difficult
to compare for smaller geographical areas.
The levels of current depletions used in this
study are those established by the 1975 Water
Resources Assessment (U. S. Water Resources
Council 1976, 1977).

Future expansion of
nonenergy water use

Energy development constitutes a major
demand for future water use, and the energy
production activities will also expand needs
for water in other sectors due to economic
and population growth. In addition, there
are a number of irrigation projects to which
water has been committed (Hansen 1976, U. S.
Department of the Interior 1977).

In order to provide for these future
demands in the analysis, projected levels of
water use for muni,cipal, industrial, and
other purposes compatible with the 1985 and
2000 energy scenarios are also estimated for
the model. The projections for municipal and

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