9602 ‎(2)‎

• UCREFRP Catalog Number: 9602
• Author: Clayton, R. and A. Gilmore.
• Title: Flaming Gorge Draft Environmental Impact Statement Hydrologic Modeling Report.
• USFW Year: 2002.
• USFW - Doc Type: \
• Copyright Material: NO

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11
Figure 10 5% Probability Level Reservoir Elevations (All Months)
Flaming Gorge Model Results
5% Probability Reservoir Elevations -
r=.;040 -- - -
6035
_ -Action
~ - No Action
°-~ 6030 -- _--
as
as
C 6025
m 6020 -- - __
C
Q
5 6015
a~
W
6010 --- - --- -- -- -__ __ -
ri 1105
Oct fJo~~, Dec ,Jan Feb 1~1ar Apr M2~~~ Jun !lul Au~1 Sep
Month
Reach One Spring Peak Flow Results
The Flaming Gorge model does not account for side inflows that occur along Reach One of
the Green River. Historically, the volumes of flow contributed by tributaries to the Green River in
Reach One have been relatively insignificant except during large thunderstorm events. Reach One
flows that appear in this report are actually the average daily releases made from Flaming Gorge
Dam. Figure 11 shows the distribution of peak flows having a duration of one day that occurred in
the model results. It is also assumed that peak flows always occur during the spring period. Thus
the distributions that appear in Figure 11 can also be used to represent the distribution of annual
peaks as well. For reference to how the reservoir was operated prior to the 199? Biological
Opinion, the distribution of historic peak flows in Reach One having a duration of one day for the
period from 1971 to 1991 are included in the tgure. Figures 1? and 13 show the distributions of
peak flows in Reach One having durations of two and four weeks, respectively.
Figure 11 5% Distribution of Peak (One Day Duration) Releases