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

Corrterrts
Abstract .................................................................... ................................. 1
Introduction ................................................................ ................................. 2
Purpose and Scope .................................................. ................................. 3
Description of Study Area ... . ........................................ ................................. 4
Acknowledgments ................................................... ................................. 5
Analysis of Historical Discharge Records ................................... ................................. 5
Overview ofDischarge-Records Computation ........................ ................................. 5
Analysis of Shift ...................................................... ................................. 7
Results for Water Years 1995-2002 ................................... ................................. 8
Results for Water Year 2003 .......................................... ................................11
Streamflow Measurements ................................................ ................................16
Measurement Set 1 .................................................. ................................16
Measurement Set Z .................................................. ................................16
Discussion of Streamflow Losses ........................................... ................................19
Summary ................................................................... ................................ 20
References Cited ........................................................... ................................ 21
Figures
1. Map showing location of streamflow-gaging stations and miscellaneous discharge-measurement
sites along the Gunnison River study reach ............................................. .......2
2-12. Graphs showing:
2. Selected statistics of daily mean discharge forthe Whitewater station before (19165)
and after (1967-2003) major completion ofthe Aspinall Storage Unit ...................... .......6
3. Discharge, shift, and percentage difference between discharge and discharge rating
for measurements made atthe Whitewater station, wateryears 1995-2002 ............... .......8
4. Discharge, shift, and percentage difference between discharge and discharge rating
for measurements made atthebelow-Redlands-dam station,wateryears 199x2002..... .......9
5. Discharge, shift, and percentage difference between discharge and discharge rating
for measurements made atthe Redlands-Canal station, wateryears 1995-2002 ........... ......10
6. Distribution of percentage differences for applied shiftsfor measurements made at
stations alongthe Gunnison Riverstudyreach,wateryears 199x2002 .................... ......11
7. Moving 3-day daily mean discharge for stations atthe upstream and downstream
ends ofthe Gunnison River study reach and differences between the discharges,
wateryear 1996 ........................................................................... ......13
8. Distribution of differences between moving 3-day daily mean discharge atthe upstream
and downstream ends ofthe Gunnison River study reach, water years 199x2003 ......... ......14
9. Distribution of differences between moving 3-day daily mean discharge atthe upstream
and downstream ends ofthe Gunnison River study reach when discharge atthe
below-Redlands-dam station is less than 2,000 cubic feet per second, wateryears
199x2003 ................................................................................ ......15
10. Moving 3-day daily mean discharge for stations atthe upstream and downstream ends
ofthe Gunnison River study reach and differences between the discharges,
water year 2003 ........................................................................... ......17
11. Distribution of unitdischargesfor stations atthe upstream and downstream ends
ofthe Gunnison River study reach and distribution of discharge measurements made
at miscellaneous discharge-measurementsites along the reach during measurement
set 1, February 5--6, 2003 ................................................................... ......18
12. Unit discharges for stations atthe upstream and downstream ends ofthe Gunnison
River study reach and discharge measurements made at site M2 during measurement
set 2, May 14^15, 2003 ..................................................................... ......19
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