Yampa River Overview

• Description: Yampa River Management Plan
• State: CO
• State: UT
• State: WY
• Basin: Yampa/White/Green
• Water Division: 6
• Date: 1/1/3000
• Title: Yampa River Overview
• Water Supply Pro - Doc Type: Report/Study

Depth, Stage, Width/Depth Ratio and Velocity
The mean inflection point for depth was 99 cfs Table 2a (range: 60 -107 for strata
1 -4, Tables 2b -e). The mean depth was 0.9 ft (range: 0.6 -0.9 for strata 1 -4). The mean
inflection point for stage was 84 cfs (range: 60 -90 for strata 1 -4). The mean stage was 1.:
ft (range: 0.9 -1.5 for strata 1 -4). The mean inflection point for width/depth ratio was 162
cfs (range: 115 -214 for strata 1 -4). The mean width/depth ratio was 145 (range: 107 -206
for strata 1 -4). The mean inflection point for velocity was 102 cfs (range: 97 -125 for
strata 1 -4). The mean velocity was 1.6 ft/s (range: 0.9 -1.9 for strata 1 -4).
Table 2a. The mean, standard deviation and coefficient of variation of inflection
points for riffles in strata 1 -4 combined.
Variable vs. Flow
Units
N
NI*
Mean
Std
C.V.
Wetted Perimeter
cfs
52
0
176.7
59.9
0.34
ft
52
0
117.5
52.9
0.45
% Wetted Perimeter
cfs
50
2
146.9
67.4
0.46
%
50
2
40.3%
16.6%
41.2%
Wetted Width
cfs
52
0
118.0
56.7
0.48
ft
52
0
103.6
45.4
0.44
Average Depth
cfs
52
0
98.7
40.8
0.41
ft
52
0
0.9
0.6
0.73
Change in Stage
cfs
52
0
84.4
41.2
0.49
ft
52
0
1.3
0.6
0.47
Width/Depth Ratio
cfs
50
2
161.5
68.7
0.43
50
2
145.1
101.7
0.70
Average Velocity
cfs
51
1
101.6
31.5
0.31
ft/s
51
1
1.6
0.7
0.42
*NI - Inflection point was non - identifiable.
14