WSP00979

• File Number: 8220.101.10.A
• Description: Colorado River-Water Projects-Glen Canyon Dam/Lake Powell-Glen Canyon Adaptive Management-AMWG
• State: AZ
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 3/3/2004
• Author: USGS
• Title: AMWG Meeting Attachments-March 3-4 2004-Computation and Analysis of the Instantaneous Discharge Record for the Colorado River at Lees Ferry-Arizona May 8 1921-Sep 30 2000
• Water Supply Pro - Doc Type: Report/Study

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STAGE AT LEES FERRY GAGE, IN FEET

EXPLANATION

o WATER-YEARS 1921-22 DATA

RATING CURVE

"",,- ""- '\ RANGE OF UNCERTAINTY IN THE ESTIMATED PEAK
DISCHARGE OF THE 1884 FLOOD

RANGE OF UNCERTAINTY IN THE ESTIMATED PEAK
DISCHARGE OF THE 1921 FLOOD

Figuro13, Stage-discharge rating curve used in this study fDr the periDd between May B, 1 921, and June 25, 1921, This rating curve
consists of a smoothed curve fit to the discharge measurements from water years 1921 and 1922, and a linear extrapolation to the
170,000",20,000 cubic feet per second peak of the 1921 flDDd at a stage of 26,5 feet, and the 210,000",30,000 cubic feet per secDnd peak Df
the 1 BB4 flDDd at a stage Df 31 feet

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30 Computation and Analvsis plthe Inslanta"eous~Dlscharoo Record 'orlhe Colorado River at Lees Ferry. Arizona-May 8, 1921. through September30, 2000