9526

• UCREFRP Catalog Number: 9526
• Author: LaGory, K. E., J. W. Hayse and D. Tomasko.
• Title: Recommended Priorities for Geomorphology Research in Endangered Fish Habitats of the Upper Colorado River Basin.
• USFW Year: 2003.
• USFW - Doc Type: Argonne, Illinois.
• Copyright Material: NO

Geomorphology Research Priorities September 2003
2. Flooded bottomlands (Split Mountain Canyon to Desolation Canyon)
• Effects of peak flow (magnitude, duration, and frequency), sediment, and
configuration of connection to main channel on maintenance of connection and
sediment deposition effects.
3. Spawning bar complexes (Desolation and Gray Canyons)
• Effects of peak flow (magnitude, duration, frequency, and timing), base flow
(magnitude and duration), and sediment on habitat conditions during the
spawning period.
Upper Colorado River Subbasin (based on potential conditions in the subbasin)
1. Connected backwaters and side channels (Moab Bridge to Green River)
• Same as those identified for Split Mountain Canyon to Desolation Canyon reach
of the Green River.
2. Flooded bottomlands (Palisade to Gunnison River and Gunnison River to Loma)
• The relationship of habitat availability to peak-flow and base-flow magnitude.
• Effects of peak flow (magnitude, duration, and frequency), sediment, and
configuration of connection to main channel on maintenance of connection and
sediment deposition effects.
3. Flooded bottomlands (Gunnison River-Hartland Dam to Roubideau Creek)
• Effects of peak flow (magnitude, duration, and frequency), sediment, and
configuration of connection to main channel on maintenance of connection and
sediment deposition effects.
4. Spawning bar complexes in the Colorado River (Palisade to Gunnison River,
Gunnison River to Loma, and Loma to Westwater) and Gunnison River (Hartland
Dam to Roubideau Creek, Roubideau Creek to Colorado River)
• Location and characteristics of spawning habitats.
• Effects of peak flow (magnitude, duration, frequency, and timing), base flow
(magnitude and duration), and sediment on habitat conditions during the
spawning period.
Primary information needs to address species-specific reach-habitat priorities include:
Green River Subbasin (based on existing conditions in the subbasin)
1. Colorado Pikeminnow
a. Connected backwaters and side channels (Split Mountain Canyon to Desolation
Canyon, Gray Canyon to Labyrinth Canyon, Labyrinth and Stillwater Canyons)
• Same as those identified for Split Mountain Canyon to Desolation Canyon
reach under overall reach-habitat priorities above.
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