9513

• UCREFRP Catalog Number: 9513
• Author: Kuhn, G. and C. A. Williams.
• Title: Evaluation of Streamflow Losses Along the Gunnison River from Whitewater Downstream to the Redlands Canal Diversion Dam, near Grand Junction Colorado, Water Years 1995-2003.
• USFW Year: 2004.
• USFW - Doc Type: Reston, VA.
• Copyright Material: NO

Analysis of Historical Discharge Records 9
5,000
3,000
U 2,000
mo
~z
Z ~ 1,000
ui ~ 700
C7
a a 500
x~
Uw
~ ~ 300
0
200
100
0.1
0.0
~ -0.1
w
w
w
z -0.2
F
w
2
~ -0.3
-0.4
-0.5
2
w
U
Z
W
W 0
LL
LL
D
W
C7
Q
F
w -2
U
w
a
-4
•
•
I i I I
1995 1996 1997 1998 1999 2000 2001 2002
WATER YEAR
Figure 4. Discharge, shift, and percentage difference between discharge and discharge rating for measurements
made at the below-Redlands-dam station, water years 1995-2002.
for the Whitewater and Redlands-Canal stations. For WYs water year (table 2). Excluding the partial data for WY 1995,
1995-2002, daily mean discharge was estimated for 85 days the differences between the annual sums of daily mean dis-
(out of 2,771) for the below-Redlands-dam station. charge at the two downstream stations and the annual sums of
Daily mean discharges at the two downstream stations daily mean discharges at the upstream station ranged from
(below-Redlands-dam and Redlands-Canal) were summed to about -28,700 to -69,800 acre-ft. The difference, as a percent-
produce an estimate of the downstream streamflow; this sum age of the upstream discharge, ranged from about -1.1 to
was subtracted from the daily mean discharge at the Whitewater -5.8 percent (table 2). These results indicate that the down-
station (the upstream streamflow). This difference provides an stream discharges generally were less than the upstream
estimate of the difference between downstream and upstream discharges.
streamflow along the study reach. These data were compiled for Moving 3-day daily mean discharges also were computed
each day of WYs 1995-2002, and the values were summed by for each of the three stations and the differences between the