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

LIST OF FIGURES
1. Diagrammatic cross-section of streambed substrate materials
illustrating high (top) and low (bottom) depth-to-embeddedness ............... 2
2. Peak flows (in cfs) in the 15-mile reach (Stratum 9) from 1897 to 1997
and frequency of years with peak flows meeting various thresholds
required for movement of bed materials, during pre- and post-
development periods ................................................5
3. Freshly cleaned cobble bars exposed during base flows in the 15-mile (top)
and 18-mile (bottom) reaches ......................................... 6
4. Site locations recorded (right) using a Global Positioning System
receiver (left) .....................................................8
5. Technique used in measuring embeddedness .............................. 9
6. Measurement of rock width across the intermediate axis (top) while
sampling particle size distribution at a lower bank site (bottom) ............... 11
7. Discharge (cubic feet per second) on dates of embeddedness sampling,
1996 and 1997 .................................................... 13
8. Mean total depth-to-embeddedness (DTE) and mean particle size (D-50)
through time in rifles in Stratum 9 (top) and Stratum 8 (middle), and
mean relative DTE through time in rifles in each stratum (bottom) ............ 22
9. Mean total depth-to-embeddedness (DTE) and mean particle size (D-50)
through time in runs in Stratum 9 (top) and Stratum 8 (middle), and
mean relative DTE through time in runs in each stratum (bottom) ............. 23
10. Mean total depth-to-embeddedness (DTE) and mean particle size (D-50)
through time in Run No. 1 (top) and Rifle No. 1 (middle) of Stratum
9-B, and mean relative DTE through time in Run and Rifle No. 1
of Stratum 9-B (bottom) ............................................ 40
11. Mean total depth-to-embeddedness (DTE) and mean particle size (D-50)
through time in Run No. 2 (top) and Rifle No. 2 (middle) of Stratum
9-B, and mean relative DTE through time in Run and Rifle No. 2
of Stratum 9-B (bottom) ........................................... 41
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