8274

• UCREFRP Catalog Number: 8274
• Author: Pitlick, J. and R. Cress.
• Title: Longitudinal Trends in Channel Characteristics of the Colorado River and Implications for Food-Web Dynamics.
• USFW Year: 2000.
• USFW - Doc Type: Recovery Implementation Program Project 48-C,
• Copyright Material: NO

Figure 21. Downstream trends in bankfull shear stress and bankfull dimensionless
shear stress of the Colorado River ....................................................................................32
Figure 22. Bed and water surface elevations through a reach near RKM 345 ....................... 33
Figure 23. Relation between discharge and dimensionless shear stress, RKM 345 ..............34
Figure 24. Bed and water surface elevations in reaches near RKM 150 and RKM 106........35
Figure 25. Relations between discharge and dimensionless shear stress, RKM 150
and RKM 106 .................................................................................................................. 36
Figure 26. Box plots showing the range in discharges that produce initial motion in
specific subreaches of the Colorado River ........................................................................38
Figure 27. Box plots showing the range in bankfull discharges in specific subreaches
of the Colorado River .......................................................................................................39
ACKNOWLEDGMENTS
This study was funded by the U.S. Fish and Wildlife Service Recovery Implementation Program
for Endangered Fish Species in the Upper Colorado River Basin. The Recovery Program is a joint
effort of the U. S. Fish and Wildlife Service (USFWS), U. S. Bureau of Reclamation (USBR),
Western Area Power Administration (WAPA), States of Colorado, Utah, and Wyoming, Upper
Basin water users, environmental organizations, and the Colorado River Energy Distributors
Association. We are especially grateful to Frank Pfiefer, Chuck McAda and Doug Osmundson of
the USFWS, and Tom Chart of the Utah Division of Wildlife for providing logistical support and
advice on various aspects of the project. Mark Van Steeter deserves special mention for initiating
field work in the Grand Junction area and for supplying data for the 15- and 18-mile reaches. We
greatly appreciate the enthusiasm and effort of all those who helped us in the field, including Cheri
Cornell, Margaret Franseen, Lex Ivey, David Lewis, Jennifer Nissenbaum, and Rebecca Thomas.
Finally, we thank Richard Marston, Jonathan Nelson, and Doug Osmundson for providing
comments on an earlier draft of the report.
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