7197

• UCREFRP Catalog Number: 7197
• Author: O'Brien, J. S.
• Title: 1983 Yampa River Cobble Reach Morphology Investigation Final Report.
• USFW Year: 1984.
• USFW - Doc Type: Fort Collins, Colorado.
• Copyright Material: NO

j

LIST OF FIGURES
_ Figure Title Page
1 Project Location . . . . . . . . . . . . . . . . . . . . 2
• 2 River Profile . . . . . . . . . . . . . . . . . . . . 4
3 River Mile 16.5 Cobble Bar . . . . . . . . . . . . . . . . 6
4 River Mile 18.5 Cobble Bar . . . . . . . . . . . . . . . . 7
5 Stage Discharge Relationship . . . . . . . . . . . . . . . 11
6 Comparison of Measured and USGS Discharge . . . . . . . . 15
7 Yampa River Discharge, 1983 and Mean . . . . . . . . . . . 16
8 Yampa, Little Snake and Combined Hydrographs, 1983 . . . . 17
9 Yampa River Annual Discharge Volumes
and Five Year Running Average . . . . . . . . . . . . . . 19
10 Annual Volume and Ten Year Running Average . . . . . . . . 20
11 Gumbel Flood Frequency Analysis . . . . . . . . . . . . . 22
12 Effective Discharge . . . . . . . . . . . . . . . . . . 25
13 Suspended Load Regression . . . . . . . . . . . . . . . 29
14 Suspended Load Regression . . . . . . . . . . . . . . . . 30
15 Bedload Regression . . . . . . . . . . . . . . . . . . 31
16 Fine Sediment Rating Curve, Mather's Hole, 1983 . • • • • 32
17 Sand Sediment Rating Curve, Mather's Hole, 1983 . • • . • 33
18 Bedload Rating Curve, Mather's Hole, 1983 . . . . . . . . 34
19 River Mile 16.5 Cobble Bar Surface Substrate . . . . . . 38
20 River Mile 16.5 Cobble Bar Subsurface Substrate . . . . . 39
21 River Mile 16.5 Cobble Bar Combined Surface and
Subsurface Substrate . . . . . . 0 . . . . . . . . . . . . 40
• 22 Transport Sediment Size Distribution . . . . . . . . . . . 41
23 Physical Model Study, Sand Level Relative
• to Top of Cobbles . . . . . . . • . . . • • • • • • . . . 50
iv