8112

• UCREFRP Catalog Number: 8112
• Author: Osmundson, D. B. and B. K. Scheer.
• Title: Monitoring Cobble-Gravel Embeddedness in the Streambed of the Upper Colorado River, 1996-1997.
• USFW Year: 1998.
• USFW - Doc Type: Grand Junction, CO.
• Copyright Material: NO

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Figure 2. Peak flows (m cfs) in the 15-mile reach (Stratum 9) from 1897 to 1997 (top) and
frequency of years with peak flows meeting various thresholds required for movement of bed
materials, during pre- and post-development periods (bottom). Data is from various USGS
gagin stations and corrected for downstream diversion withdrawals; periods of pre- and
post-development periods are 1897-1942 and 1954-1997, respectively (see Osmundson and
Kaeding 1991). Threshold flows for initiating movement of bed materials (10,000 cfs) and
for producing widespread mobilization of the bed (20,000 cfs) are averages from threshold
flows modeled for two sites in Stratum 9 by Van Steeter (1996).
1915 1925 1935 1.945 1955 1965 1975 1985 1995
Year
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