8119

• UCREFRP Catalog Number: 8119
• Author: Valdez, R. A. and B. R. Cowdell.
• Title: Effects of Flow Regulation and Ice Formation on Overwinter Nursery Habitat and Survival of Age-0 Colorado Squawfish in the Green River Below Flaming Gorge Dam - Draft.
• USFW Year: 1996.
• USFW - Doc Type: Logan, Utah.
• Copyright Material: NO

Purpose and dates of fields trips on the Green River for the winter ice study.

............................................................. 4

Summary of minimum physical and chemical habitat requirements for
backwaters sampled during the Winter Ice Study. . . . . . . . . . . . . . . . . . . . . . . . . 6
Mean daily flows (cfs) and volumes (acre-feet) of the Green River for
November, 1993 through March, 1994, as measured at Greendale, UT
(USGS gage 09234500). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . 10
Mean daily flows (cfs) and volumes (acre-feet) of the Green River for
November, 1993 through March, 1994, as measured at Jensen, UT (USGS
gage 09261000). '" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Mean daily flows (cfs) and volumes (acre-feet) of the Green River for
November, 1994 through March, 1995, as measured at Greendale, UT
(USGS gage 09234500). ......................................... 11
Mean daily flows (cfs) and volumes (acre-feet) of the Green River for
November, 1994 through March, 1995, as measured at Jensen, UT (USGS.
gage 09261000). ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Average surface ice thickness, free water depth, temperature, and dissolved
oxygen for 14 backwaters sampled during Trip I (January 31 - February 4,
1994) and Trip II (February 21 - 24, 1994) of winter, 1993-94. CH = chute,
SC = scour, ER = eddy return. ..................................... 18
Average surface ice thickness, free water depth, temperature, and dissolved
oxygen for 9 backwaters sampled during Trip I (January 6 - 8, 1995) and Trip
II (February 6 - 7, 1995) of winter, 1994-95. CH = chute, SC = scour, ER =

eddy return. ................................................... 19

Summary of overwinter habitat suitability of 14 backwaters sampled during
winter of 1993-94. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Summary of overwinter habitat suitability of 9 backwaters sampled during
winter of 1994-95. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

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LIST OF TABLES

Table 1.

Table 2.

Table 3.

Table 4.

Table 5.

Table 6.

Table 7.

Table 8.

Table 9.

Table 10.

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