WSP04165

• File Number: 8240.200.10.B
• Description: UCRBRIP - Riverine Fish Flow Investigations
• Basin: Colorado Mainstem
• Date: 6/1/2003
• Author: CDOW
• Title: Riverine Fish Flow Investigations 2003
• Water Supply Pro - Doc Type: Publication

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TABLE OF CONTENTS

APPROVAL PAGE

.11

LIST OF TABLES..

....v

LIST OF FIGURES

. VII

LIST OF APPENDIX TABLES

..IX

LIST OF APPENDIX FIGURES.

.........X

INTRODUCTION

. I

STUDY AREA...

.4

METHODS ..

.. . ..12

Fish Sampling...
Channel Topography.
Hydraulic Simulation .... .............................
Habitat Quantification..
Development of Meso-Habitat Suitability..
Determination of Habitat Availability..

...12
.... ...14

.. ..................... 19
........................20
. ..20
..... ...22

RESULTS....

.......23

Fishery Quantification... ............ .. .......................................23
Fish Over IS-cm in Length ...........23
Fish Less Than lS-cm in Length ........... ................................28
Size Structure for Native Fish ....... ... .......30
Density and Biomass Estimation.. .........34
Habitat Quantification.. . . .... .......................... ... .... ... ........39
General Site Description.......... .. .. ......................... . ................... ..... .39
Habitat Composition and Diversity...................... ........... .. ......... .......40
Habitat Suitability .. .............. ............... .44
Habitat Availability Versus Flows..... ............ ........47

DiSCUSSION....

.... ......62

Habitat Modeling, Flow Needs for Native Sucker
Habitat Composition and Diversity.......... ............
Field Observation, Flow Needs of Native Fish.......
Non-Native Fish Versus Flows.. ...........
Flow for Endangered Fish .... ........

........ .62

..... .........65
. ......................... ........................ 66
...... .q. ..............68
........... ..69

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