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

TABLE OF CONTENTS
LIST OF TABLES .............................................................................. ii
LIST OF FIGURES .............................................................................
LIST OF KEY WORDS ........................................................................ V
ACKNOWLEDGEMENTS .................................................................... A
EXECUTIVE SUMMARY ................................................................... vii
INTRODUCTION ............................................................................... 1
RELATION BETWEEN FISH HABITATS AND GEOMORPHOLOGY ...... 2
STUDY AREA .................................................................................... 4
DATA SOURCES AND METHODS ....................................................... 7
Streamflow .................................................................................. 7
Sediment Loads ............................................................................. 8
Average Bed Elevations ................................................................... 8
Aerial Photograph-GIS Analysis ....................................................... 9
Field Studies ............................................................................... 10
RESULTS ..........................................................................................15
Long-Term Trends in Streamflow of Unregulated Rivers ........................... 15
Long-Term Trends in Streamflow of the Colorado and Gunnison Rivers ..........18
Suspended Sediment Loads ...............................................................23
Average Bed Elevations ...................................................................26 .
Historical Changes in Channel Morphology ............................................28
Geomorphic Response to Recent Flow Events .........................................33
Development of Discharge-Shear Stress Relations .....................................37
Downstream Hydraulic Geometry ........................................................41
Magnitude-Frequency Analysis ...........................................................46
DISCUSSION ....................................................................................49
CONCLUSIONS .................................................................................51
RECOMMENDATIONS .......................................................................52
BIBLIOGRAPHY ...............................................................................53
APPENDICES .................................................................................. A-1
i