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

10 Evaluation of Streamflow Losses Along the Gunnison River from Whitewater Downstream to the Redlands Canal Diversion
Dam, near Grand Junction, Colorado, Water Years 199x2003
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1995 1996 1997 1998 1999 2000 2001 2002
WATER YEAR
Figure 5. Discharge, shift, and percentage difference between discharge and discharge rating for measurements
made at the Redlands-Canal station, water years 1995-2002.
sum of the 3-day daily mean discharges at the two downstream An example of the moving 3-day daily mean discharges at
stations and the 3-day daily mean discharge at the upstream sta- the three stations along the study reach, the sum of the 3-day
tion, for additional analyses. The moving 3-day daily mean was daily mean discharges at the two downstream stations, and the
used because the sum of the daily mean discharge at the down- differences between the downstream and upstream discharges
stream stations almost never is the same as the daily mean dis- for WY 1996 are shown in figure 7. The characteristics of
charge at the upstream station because of traveltime effects, the data for the other WYs (excluding WY 2003) were similar.
even with no loss or gain in the reach; a moving 3-day daily Most of the discharge differences are between -200 and
mean could smooth out some of the abrupt differences between +100 ft3/s and most of the percentage differences are between
the daily mean discharges attributed to traveltime. More com- -10 and 0 percent (fig. 7). The differences between the 3-day
plex analytical methods, such as those involving computerized daily mean discharge sum at the two downstream stations and
streamflow routing programs, were beyond the scope of this the 3-day daily mean discharge at the upstream station seem to
study. be smaller in figure 7A in comparison to figure 7B; this prima-
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