7050

• UCREFRP Catalog Number: 7050
• Author: Andrews, E. D.
• Title: Effective And Bankfull Discharges of Streams In THe Yampa River Basin, Colorado and Wyoming
• USFW Year: 1980
• USFW - Doc Type: Journal of Hydrology
• Copyright Material: YES

,-

a19

Effective
discharge
(m I Is)

Duration
of effective
discharge
(percentage
of time)

Bankfull
discharge
(mIls)

127
119
113
31.4
14.2

53.8
258
0.481
0.312

46.2
17.3

172
1.42
96.3
58.1

1.1
1.1
1.4
0.7
2.8

1.2
2.5
0.65
0.4

133
167
114
28.9
16.1

72.2
255
0.538
0.312

2.8
1.3

46.7
15.6

3.0
0.7
2.1
2.1

167
1.40
101
60.9

The Little Snake River subbasin supplies 27% of the annual runoff to the
Yampa River at Deerlodge Park but 69% of the sediment load. Conversely,
\ the Yampa River subbasin contributes 73% of the runoff and 27% of the sed i-
\ ment load (Fig. 4).
G Comparisons f<1r other gaging stations are equally striking. The relatively
large sediment load of the Little Snake River subbasin enters the Little Snake
River between Dixon (site 3) and Lily (site 1) (Fig. 4). Approximately 60%
I of the entire sediment load of the Yampa River at Deerlodge Park is contribut-
i ed from the drainage area between these two gaging stations. The drainage
\ area between the gaging stations is less than 35% of the entire basin area and
: supplies less than 3% of the runoff. Approximately 76% of the total stream-
i flow is supplied by the eastern part of the basin upstream from site 3 on the
LLittle Snake River and site 12 on the Yampa River.
These comparisons show that the 15 stream reaches studied in the Yampa
River basin were varied and diverse. The streams represent a considerable
range of discharges, sediment loads and bed-material-size distributions .that
result from climatic, geologic and physiographic differences within the basin
(Andrews, 1978).