FLOOD05243

• County: Statewide
• Stream Name: White River
• Basin: Statewide
• Title: Floodplain Information Report Volume 2
• Date: 3/1/1995
• 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 ..............,......,.".",................. 3
2.1 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3
2.2 StudyReach ...........................................3
2.3 Basin Characteristics . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5
2..4 Summary of Drainage Areas ................................ 5

2.5 Flood Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7

3.0 HYDROLOGIC ANALYSIS .................................... 10

3.1 Existing Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10
3.2 New Hydrologic Information ..........,.......,............ 10
3.3 Equation Selection Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11
3.4 Hydrologic Findings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11

4.0 HYDRAULIC ANALYSIS ..................................... 14

4.1 Base Mapping ......................................... 14
4.2 Stream Reaches ........................................ 14
4.3 Field Surveys and Cross-Section Preparation .................... 17
4.4 Computing Flood Depths. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 18
4.5 Delineating Flood Boundaries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 19

5.0 I1\'TERPRETATION OF THIS REPORT. . . . . . . . . . . . . . . . . . . . . . . . . . .. 22
5.1 Hydrologic Findings .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 22
5.2 Hydraulic Findings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 22
5.3 Floodplain Delineations . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 22

6.0 REFERENCES. . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . .. 23

LIST OF TABLES

TABLE
1 Stream Gage Data
2 DTainage Area Summary
3 Flow Summary
5 Reach Classifications
4 Cross-section Summary
5 Depth of Flooding Summary

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