9385

• UCREFRP Catalog Number: 9385
• Author: Hawkins, J.
• Title: Responses by Flaming Gorge Technical Integration Team to April 4, 2000, Minority Report from John Hawkins
• USFW Year: 2000.
• USFW - Doc Type: Flow and Temperature Recommendations for Endangered Fishes in the Green River Downstream of Flaming Gorge Dam ‎(hereafter the Flow Report.
• Copyright Material: NO

TABLE OF CONTENTS

LIST OF TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

LIST OF FIGURES . . . . . . . . . . .'. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

ACKNOWLEDGMENTS ....................................... iv

EXECUTIVE SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Keywords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1

METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

STUDY AREA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

HYDROLOGY RESOURCES REVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Geology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Vegetation and Precipitation .............................. 11

Land Use ........................................... 12

Hydrology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12

Sediment Yield ....................................... 19
Channel Equilibrium Concepts ............................. 21
Little Snake River Flows and Channel Morphology ............... 24
Yampa River Flows and Channel Morphology. . . . . . . . . . . . . . . . . .. 25
Green River Flows and Channel Morphology ................... 28
Effects of Flow Regulation on Channel Morphology . . . . . . . . . . . . . .. 30
Hydrologic Data Deficiencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 45
Channel Monitoring .................................... 48
Channel Morphology ................................... 50

FISHERIES REVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 52
Fishery Collections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 52
Species Composition and Abundance ........................ 53
Fish Reproduction ..................................... 61
Colorado Pikeminnow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 62
Humpback Chub ...................................... 65

RECOVERY PROGRAM ELEMENTS .............................. 69
Instream Flows ....................................... 69

Habitat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 72

Nonnative Fishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 74