WMOD00305 ‎(2)‎

• Title: Demonstrating Water Augmentation by Cloud Seeding in the Colorado River Basin
• Date: 5/1/1974
• Weather Modification - Doc Type: Report

above Lees Ferry, the dividing point between the Upper

Basin and Lower Basin is 109,500 square miles, but the

overall Basin average runoff is only 2.3 inches 2/.

'.

Approximately 75 percent of the total Upper Basin

..

runoff comes from the 14,200 square miles, representing

13 percent of the Upper Basin land area. Another 10

percent of the runoff is produced in the additional
9,500 square miles yielding 1 to 10 inches runoff.

The eight high producing runoff areas are generally

above the 9,500 foot elevation level and have an average

winter precipitation of over 20 inches during the

October through April period.

Average winter
(October-April)
High producing Area size Precipitation
Runoff areas ( square miles) (inches)
Upper Green 1,050 23.0
Uinta 2,250 20.5
Yampa 1,450 23.5
White 1,100 23.4
Upper Colorado 3,000 20.7
Grand Mesa 450 24.2
Gunnison 1,600 21.4
San Juan 3,300 24.1
UPPER BASIN 14,200 22.3
~

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2/ Sch1eusener, R. A. and Crow, L. W., "Analysis of
Precipitation Data in the Upper Colorado River Basin"
Report CER61RAS52, Colorado State University, Fort
Co11~ns, Co1orado, October 1961.

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