WSP12565

• File Number: 8240.200.30.A
• Description: Colorado River Basin Threatened-Endangered - UCRBRIP - RIPRAP - Flow Recommendations
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 7/1/2003
• Author: US FWS
• Title: Flow Recommendations to Benefit Endangered Fishes in the Colorado and Gunnison Rivers - 07-01-03
• Water Supply Pro - Doc Type: Report/Study

Figure

2.22

2.23

2.24

2.25

2.26

2.27

2.28

2.29

3.1

3.2

3.3

000300

LIST OF FIGURES (Continued)

Page

Seasonal distribution of depth to embeddedness for river-wide
samples in the Colorado and Gunnison rivers. . . . . . . . . . . . . . . . . . . . . . . .. 2-40

Mean and 95% confidence intervals for periphyton chlorophyll-a
values calculated for the river-wide substrate samples in the Colorado
and Gunnison rivers, 1994-1995. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-41

Seasonal distribution of periphyton chlorophyll-a for riffles and runs
in the Colorado and Gunnison rivers, 1994-1995. . . . . . . . . . . . . . . . . . . . .. 2-41

Mean and 95% confidence interval of invertebrate dry weights for
river-wide samples collected from the Colorado and Gunnison rivers,

1994-1995. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-43

Seasonal distribution of invertebrate dry weight for riffles and runs in
the Colorado and Gunnison rivers, 1994-1995. . . . . . . . . . . . . . . . . . . . . . .. 2-43

Interrelationships between In cWorophyll a, In invertebrate dry
weight, and principal components scores associated with physical
factors measured by Lamarra (1999). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-44

Relationship of floodable area to river flow at Escalante SW A near

Delta. ....................................................... 2-46

Relationship of surface area of different habitat types to river flow at
a study site within Escalante SW A. ................................ 2-47

Mean electrofishing catch rates for four native fishes in 11 strata of
the Colorado River and 1 stratum of the Gunnison River ................ 3-4

Plot of scores for factors 1 and 2 determined by principal components
analysis of 13 river flow variables compared with relative density of
three introduced cyprinids. ... ~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-12

Distribution of Colorado pikeminnow in the upper Colorado and

Gunnison rivers. ............................................... 3-16

3.4 Mean size of sub adult and adult Colorado pikeminnow in the
Colorado River for nine geomorphic strata described by Osmundson

(1999). ...................................................... 3-17

Pinal Report

Xl

July 2003