FLOOD10388 ‎(2)‎

• County: Statewide
• Stream Name: Gunnison River
• Title: Floodplain Information Report - Volume 3 - Gunnison River from Delta to the Confluence of the Colorado River
• Date: 5/1/1995
• Prepared For: Recovery Implementation Program for Endangered Fish Species in the Upper Colo
• Prepared By: CWCB
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE OF CONTENTS

Preface

1.0 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1

1.1 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1

1.2 Acknowledgements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .. 1
. 1.3 Related Flood Studies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1

2.0 STUDY AREA .............................................. 2

. 2.1 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2

2.2 Study Reach ........................................... 2

2.3 Basin Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4
2.4 Summary of Drainage Areas ................................ 4
2.5 Flood Characteristics . . . . . . . . : . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6

3.0 HYDROLOGIC ANALYSIS ..................................... 9

3.1 Existing Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9

3.2 New Hydrologic Information ........,........................ 9
3.3 Hydrologic Findings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " 9

4.0 HYDRAULIC ANALYSIS ..................................... 12

4.1 Base Mapping ......................................... 12

4.2 Stream Reaches ........................................ 12

4.3 Field Surveys and Cross-Section Preparation .................... 15
4.4 Computing Flood Depths. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 16
4.5 Delineating Flood Boundaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 17

5.0 INTERPRETATION OF TillS REPORT. . . . . . . . . . . : . . . . . . . . . . . . . . .. 20
5.1 Hydrologic Findings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20
5.2 Hydraulic Findings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20
5.3 Floodplain Delineations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20

6.0 REFERENCES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 21

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LIST OF TABLES

TABLE
1 Stream Gage Data
2 Drainage Area Summary
3 Flow Summary
4 Reach Classification
5 Cross-section Summary
6 Depth of Flooding Summary

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