Evaluation of Instream Flow Methods and Determination

• Year: 1979
• Title: Evaluation of Instream Flow Methods and Determination of Water Quantity Needs for Streams in the State of Colorado
• CWCB Section: Stream & Lake Protection
• Author: R. Barry Nehring
• Description: Evaluation of Instream Flow Methods and Determination of Water Quantity Needs for Streams in the State of Colorado
• Publications - Doc Type: Tech Report

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TABLE OF CONTENTS

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LIST OF TABL~S
LIST OF FIGURES . . . . . .
LIST OF APPENDICES .
ACKNOWLEDGEMENTS .
INTRODUCTION . . . . .
METHODS AND MATERIALS
Selection of Study Streams
Field Data Collection Plan
Survey Methods Used . . . . .
Criteria For Minimum Flow Determination . .
Chronological Order of Data Analysis
Population Estimation Methodologies . .
Instream Flow Service Group - Special
Analysis Procedures . . . . . . .
RESULTS AND DISCUSSION . . . . . . . . . .
Single Transect (R-2 Cross) Method ... .
Multiple Transect (R-2 Cross) Method . . . . .
Incremental (IFG4) Method . . . . . . . . . . . .
Montana (Tennant) Method .... . . .
Weighted Usable Area (IFG3) Method
Comparison of Minimum Flow Recommendations
Comparison of Predictive Capabilities of the
Multiple R-2 Cross and Incremental (IFG4)

Methods .. . . . . . . . . . . . .. .. . .

Time and Cost Analysis . . . . . . . . . . . . . . . .
Requirements for Methodology Improvements - Single
and Multiple Transect R-2 Cross Methods
Requirements for Methodology Improvement - IFG4 . . . .
Requirements for Methodology Improvement - IFG3 . . . .
Methodologies in Relation to Biological Conditions
Reliability and Comparability of Methodologies . . . .
Cost/Benefit Analysis . . . . . . . . . . .
Recommendations for Methodology Application
in Colorado . . . . . . . . . . . .

SUMMARY . . . .
LITERATURE CITED
APPENDICES . . .

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