9614

• UCREFRP Catalog Number: 9614
• Author: Bowen, Z. H. and e. al.
• Title: Habitat Measurement and Modeling in the Green and Yampa Rivers.
• USFW Year: 2001.
• USFW - Doc Type: \
• Copyright Material: NO

37
drainages. The timing and sequencing of these spikes may or may not have biological
and geomorphic implications but it is clear that the flow pattern observed in the Green
River mirrored that of the Yampa (Figure 5).
A second interesting aspect of the pre- and post-Flaming Gorge comparison
relates to water year 1984, the largest water year on record in the Green River basin. The
500
450
400
350
w
E 300
2)250
M
L
A 200
150
100
0
50
0 30 60 90 120 150 180 210 240 270 300 330 360 390
Julian Day
Figure 5. Annual hydrographs for the Green (dark line) and Yampa (light line) Rivers
during water year 2000, showing the temporal correspondence in discharges between the
two streams. Green River discharge measured near Jensen, UT and Yampa discharge
from Deerlodge Park.
1984 peak flow was also the highest on record for the Green River, (1,133 m3/s in the
Green River and 915 m3/s in the Yampa). Taken over the period of record (1947-2000),
the recurrence interval for the 1984 peak flow at Jensen was 54 years. However, Green
River flow records indicated that discharges approaching 1984 levels occurred frequently
prior to the construction of Flaming Gorge Dam. Between 1947 and 1962, the peak