WSP01392

• File Number: 8240.200.10.B
• Description: UCRBRIP - Riverine Fish Flow Investigations
• Basin: Colorado Mainstem
• Date: 6/1/2000
• Author: CDOW
• Title: Riverine Fish Flow Investigations 2000
• Water Supply Pro - Doc Type: Publication

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TABLE OF CONTENTS

APPROVAL PAGE ...................................................... .......... .................................................. ..... II
LIST OF TABLES...........................................................................................................................iv
LIST OF FIGURES................... .......................................... .......................................................... ...v
INTRODUCTION ....................... ........ ................................................................................... .... I
Study Objective.. ... ............. ... ........... ................. ............ ............... ... ............................... .... 3
STUDY AREA .................................................................................................................... .......... 3
Yampa River ..... ....... ............ .................... ......... .... ... ......... ................................................... 3
Colorado River - IS-Mile Reach......................................................................................... 8

METHODS.................................................................................................................................... .12
Fish samples..................................................................................................................... ...12
Habitat mapping... .............. .......................... ............. ..... .................................................. 13
Total Station............................................................................................................ I 3
Global Positioning Systems and Sonar ....................................................................14
Acoustic Doppler and Marsh McBemie Velocity Meters.......................................... 16
1998 Duffy Tunnel and Sevens Surveys................................................................... 17
1999 IS-Mile Reach Survey....................................................................................18
1999 Duffy Tunnel and Sevens Surveys ..................................................................19
Data Reduction and Preparation ............. ....................................................... ...... .....20
Hydraulic Simulation ........................................................................................................ .21
Pre-Model Modeling Using HEC-RAS......................... ..................................21
Two-Dimensional Modeling Using SMS and RMA2... ....................... ....................24
Habitat Availability..... ................ ........... . ............. ........... .......... .......................................26

RESULTS....... ............................................ .................... ....................................................... ....27
Species Composition ................. ............................... ......................................... ..............27
Yampa River Fish Samples ............................ ................................ ...................27

Colorado River......... ........................................................................................ ....... .30
Length Frequency and Mean Length .............................. ......................................................33

Density Estimates.......... ............................. ........................................ ...............................35
Seining ......................... ........................... ............. ....................................................... ..37
Habitat Composition........................................................................................................... .39

DISCUSSION.................................................. ............... ................................ ...................... .....43
SUMMARY AND CONCLUSIONS ............................................................................................ ..45
RECOMMENDATIONS and ADJUSTMENTS TO STUDY DESIGN....................................46

ACKNOWLEDGEMENTS. .... .......................... .................... .......... '" ... ... :.......... ................... ...... ...47
REFERENCES.............. ..... ............ ............ .......................... .................................. ...... ......... ...... ...48
APPENDIX 1: Flow Data and Hydrographs...................................................................................50
APPENDIX 2: Fish Data.............. .............................................................. ................................... .54

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