7703

• UCREFRP Catalog Number: 7703
• Author: Pucherelli, M. J. and W. P. Goettlicher.
• Title: Mapping an Instream Habitat on the San Juan River Using Airborne Videography.
• USFW Year: 1992.
• USFW - Doc Type: Washington, D.C.
• Copyright Material: NO

CONTENTS

Introduction

Page
1

Conclusions

2

Methods . .
Study site .
Video acquisition .
Image processing.
Interpretation
Riverflows

2
2
3
3
4
5

6
6
7
9
10

10

Results . .
Reach 1
Reach 2
Reach 3 . . .. ........
Backwater and side channel distribution .

Discussion . . . . .

Recommendations .

12

References . . . . .

13

TABLES

Table

1 1991 San Juan River flow on videography acquisition dates
2 Videography analysis results - Reach 1. ... .
3 Videography analysis results - Reach 2 . . . . . . .
4 Videography analysis results - Reach 3 . . . . . . .

6
7
9
10

FIGURES

Figure

1 Location map of study site. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2 Examples of backwater form and location . . . . . . . . . . . . . . . . . . . . . . 16
3 Examples of side channel size and location. . . . . . . . . . . . . . . . . . . . . . 17
4 1991 water year hydro graph of San Juan River at Shiprock, NM, gauge 09368000 18
5 1991 water year hydrograph of San Juan River at Four Corners, CO,
gauge 09371010 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6 1991 water year hydro graph of San Juan River near Bluff, UT, gauge 09379500 20
7 Reach 1 (RM 158 - 119) habitat to flow relationships 21
8 Reach 1 habitat to flow relationships continued . . . 22
9 Reach 2 (RM 118 - 68) habitat to flow relationships . 23
10 Reach 2 habitat to flow relationships continued . . . 24
11 Reach 3 (RM 67 - 52) habitat to flow relationships . 25
12 Reach 3 habitat to flow relationships continued . . . 26
13 Distribution oftotal backwater area per mile as flow changes 27
14 Distribution oftotal side channel area per mile as flow changes 28
15 Example of high flow habitat active and inactive. . . . . . . . . 29
16 Example of side channel cut-off and backwater formation due to flow 30
17 Emergence of submerged habitat with decreased flow
Top - 4,530 ft3/s, bottom - 653 ft3/s . . . . . . . . . . . . . . . . . 31

APPENDIX

Habitat totals per mile by flow and reach

32

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