7824

• UCREFRP Catalog Number: 7824
• Author: Miller, W. H., et al.
• Title: Colorado River Fishery Project, Part III, Final Report, Contracted Studies.
• USFW Year: 1982.
• USFW - Doc Type: \
• Copyright Material: NO

• CONTENTS
•
1. IFG Study of Physical-Chemical Habitat Conditions
on the Green and Colorado Rivers in Colorado and Utah
Pa e
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
The simulation models - general . . . . . . . . . . . . . . . . . . 1
PHABSIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Instream water temperature model . . . . . . . . . . . . . . . . 2
Flow-habitat linkages . . . . . . . . . . . . . . . . . . . . . . 3
Materials and methods . . . . . . . . . . . . . . . . . . . . . . . 3
PHABSIM site selection . . . . . . . . . . . . . . . . . . . . . 3
PHABSIM data collection, general . . . . . . . . . . . . . . . . 5
Colorado River . . . . . . . . . . . . . . . . . . . . . . . . 5
Green River . . . . . . . . . . . . . . . . . . . . . . 6
Hydraulic simulation model calibration . . . . . . . . . . . . . 6
Habitat suitability curves . . . . . . . . . . . . . . . . . . . 6
Water temperature modeling . . . . . . . . . . . . . . . . . . . 7
Stream system structure . . . . . . . . . . . . . . . . . . . . . 10
Meterology . . . . . . . . . . . . . . . . . . . . . . . . . 11
Hydrology . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Published temperature data smoothing . . . . . . . . . . . . . 12
Water temperature screening, Black Rocks and Jensen reaches . . . 12
Flow time series generation . . . . . . . . . . . . . . . . . . . 12
Results and discussion . . . . . . . . . . . . . . . . . . . . . . . 13
Analyses of WUA . . . . . . . . . . . . . . . . . . . . . . . . . 13
WUA vs ascending flow . . . . . . . . . . . . . . . . . . . . . . 15
Green River . . . . . . . . . . . . . . . . . . . . . . . . . 15
Colorado River . . . . . . . . . . . . . . . . . . . . . . . . 15
Humpback chub adults at Black Rocks . . . . . . . . . . . . . 19
Analysis of flow and WUA time series . . . . . . . . . . . . . . 19
Temperature model results . . . . . . . . . . . . . . . . . . . . 23
Temperature simulations at Black Rocks and 0uray . . . . . . . . 23
Validation . . . . . . . . . . . . . . . . . . . . . . . . . 28
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Maximum daytime water temperatures . . . . . . . . . . . . . . . 31
Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Literature cited . . . . . . . . . . . . . . . . . . . 33
Appendix I Calibration details for Green Colorado IFG-4
and WSP Models . . . . . . . . . . . . . . . . . . . 35-36
Summary of IFG-4 input stage and discharge
with computed slopes and intercepts . . . . . . . . . 37
Summary of IFG-4 velocity adjustment factors
for a range of flows at Black Rocks, Moab,
and Grays Canyon site, Green River . . . . . . . . . . 38
Appendix II' Details of computer linkage system for pro-
duction of PHABSIM results from general
and specific hydrologic input . . . . . . . . . . 39-45
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