8157

• UCREFRP Catalog Number: 8157
• Author: Pitlick, J., M. V. Steeter, B. Barkett, R. Cress and M. Franseen.
• Title: Geomorphology and Hydrology of the Colorado and Gunnison Rivers and Implications for Habitats Used by Endangered Fishes.
• USFW Year: 1999.
• USFW - Doc Type: \
• Copyright Material: NO

LIST OF FIGURES
Figure 1. Location of rivers and selected gauging stations in the Colorado River basin ........... 4
Figure 2. Detailed map showing study reaches near Grand Junction, Colorado .................. . 5
Figure 3. Aerial photograph of a segment of the Colorado River near RM 175 ................... . 6
Figure 4. Cumulative reservoir storage capacity as a percentage of the annual streamflow of
the Colorado River and the Gunnison River ............................................................ . 8
Figure 5. Digitized maps of the Colorado River in 1937 and 1993 ................................. . 9
Figure 6. Grain size distributions of surface/subsurface sediment of the Colorado River........ 12
Figure 7. Grain size distributions of surface/ subsurface sediment of the Gunnison River....... 12
Figure 8. Streamflow data for the East River at Almont, CO ......................................... 16
Figure 9. Streamflow data for the Yampa River at Maybell, CO ..................................... 17
Figure 10. Streamflow data for the Colorado River at Glenwood Springs, CO ................... 19
Figure 11. Streamflow data for the Colorado River near Cameo, CO ............................... 20
Figure 12. Streamflow data for the Gunnison River near Grand Junction, CO .................... 22
Figure 13. Suspended sediment rating curves for the Colorado River near Cameo ............... 23
Figure 14. Suspended sediment rating curves for the Gunnison River near Grand Junction ..... 24
Figure 15. Long-term trends in annual discharge and suspended sediment loads of the
Colorado River and the Gunnison River ................................................................ 26
Figure 16. Long-term trends in average bed elevations at USGS gauging stations ................ 27
Figure 17. Changes in main channel area, island area, and side channel area of the
Colorado River, 1937- 1993 ............................................................................. 29
Figure 18. Changes in main channel area, island area, and side channel area of the
Colorado River, 1954-1968 ............................................................................. 31
Figure 19. Changes in main channel area, island area, and side channel area of the
Gunnison River, 1937-1995 ............................................................................. 32
Figure 20. Hydrographs for separate periods of snowmelt runoff from 1993 to 1995 ........... 33
Figure 21. Surveys of selected cross sections of the Colorado River showing changes before
and after the period of high runoff in 1995 ............................................................. 35
Figure 22. Surveys of selected cross sections at the mouths of backwaters in the 15-mile and
18-mile reaches ............................................................................................. 36
Figure 23. Water-surface profiles at two flow-modeling sites ....................................... 37
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