CRDSS_Task1_14-19_ImprovedEstimationIrrigatedAcres_GunnisonBasin

• Title: CRDSS Task 1.14-19 - Consumptive Use Model - Improvised Estimation of Irrigated Acreage in the Gunnison River Basin
• Description: This task memorandum documents the methods used to improve the estimation of crop-type acreage and distribution by county for all irrigated crops in the Gunnison River basin.
• Decision Support - Doc Type: Task Memorandum
• Date: 1/9/1995
• DSS Category: Consumptive Use
• DSS: Colorado River
• Basin: Gunnison
• Contract/PO #: C153658, C153727, C153752
• Grant Type: Non-Reimbursable
• Bill Number: SB92-87, HB93-1273, SB94-029, HB95-1155, SB96-153, HB97-008
• Prepared By: Riverside Technology inc.

USBRCASUSBRCASUSBRCASUSBRCASUSBRCASUSBRCAS
1985 1985 1986 1986 1987 1987 1988 1988 1989 1989 1990 1990
Listed Used Listed Used Listed Used Listed Used Listed Used Listed Used
Acres Acres Acres Acres Acres Acres Acres Acres Acres Acres Acres Acres
Ouray
Alfalfa 2000 6019 2000 6020 2500 7530 1800 5420 1500 4520 2000 6020
Pasture 6805 3990 5980 3990 6190 3990 6700 3990 7420 3990 6190
Winter wheat 0 1003 0 0 0 0 0 0 0 0 0 0
Corn, grain 0 502 0 0 0 0 0 0 0 0 0 0
Corn, silage 100 0 0 0 0 0 0 0 0 0 200 0
Spring grains 200 0 100 100 0 0 0 0 0 0 0 0
Other hay(Pasture) 9200 0 7600 0 8000 0 9000 0 10400 0 8000 0
Pasture short 0 2391 0 2090 0 2160 0 2340 0 2600 0 2170
Total (CAS) 11500 13690 14490 14790 15890 14190
Total (USBR) 16720 14190 15880 14460 14540 14380
CASUSBRCASUSBRCASUSBRCASUSBRCASUSBRCASUSBR
1985 1985 1986 1986 1987 1987 1988 1988 1989 1989 1990 1990
Listed Used Listed Used Listed Used Listed Used Listed Used Listed Used
Saguache Acres Acres Acres Acres Acres Acres Acres Acres Acres Acres Acres Acres
Alfalfa 16100 2736 13000 2210 15000 2550 14500 2470 14000 2380 15000 2550
Pasture 5540 34110 5700 34110 5980 34110 6980 34110 6380 34110 6380
Winter wheat 0 1231 0 0 0 0 0 0 0 0 0 0
Spring grains 59000 0 51700 1090 36400 760 34200 720 40600 850 31300 660
Other hay(Pasture) 31200 0 33000 0 36200 0 48000 0 40900 0 41000 0
Potatoes 8900 0 0 0 0 0 0 0 0 0 0 0
Pasture short 0 4173 0 4300 4500 5250 4800 4810
Total (CAS) 115200 131810 121710 130810 129610 121410
Total (USBR) 13680 13300 13790 15420 14410 14400
Note: The shaded cells in the table indicate values added by the USBR from the U.S. Department of
Agriculture to improve the CAS irrigated acreage.
Table 2 shows the original Colorado crop acreage used by the USBR for the Colorado River System
Consumptive Uses and Losses Report, 1985-1990 . The CAS data by county was subdivided into
hydrological unit for all Gunnison River basin counties.
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A 275 01.09.95 1.14-19 Al-azzawe