8221

• UCREFRP Catalog Number: 8221
• Author: Van Steeter, M. M.
• Title: Historic and Current Processes Affecting Channel Change and Endangered fish Habitats of the Colorado River Near Grand Junction, Colorado.
• USFW Year: 1996.
• USFW - Doc Type: Doctor of Philosophy.
• Copyright Material: NO

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21
Of the four flow and sediment transport modeling sites, two were
established in the 15 mile reach (Palisade and Corn Lake sites), and two in
the 18 mile reach (Redlands and RM162.4 sites) (Figure 2.1). Each site
consists of 6-7 main channel cross-sections, spaced aPI?roximately 1
channel width apart, located in relatively straight, single-thread reaches of
the river. Both sites in the 15 mile reach are constrained on their left bank

by shale cliffs, but have a floodplain on their right bank. In the 18 mile
reach the sites have vegetated floodplains on both banks. Thus, the
channel through these sites has the ability to adjust, and should represent
quasi-natural conditions throughout the Grand Valley.
The 32 main channel cross-sections were surveyed at one-mile
intervals, as measured on 1:24,000 scale topographic maps. Each cross-
section extended above the bankfull elevation, and varied in width from
approximately 75 to 300 meters (745-985 ft). All cross-sections were
alluvial, although frequently one bank was confined by a dike or bedrock.