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Potential Effects of Four Flaming Gorge Dam Hydropower Operational Scenarios on the Fishes of the...
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Potential Effects of Four Flaming Gorge Dam Hydropower Operational Scenarios on the Fishes of the Green River, Utah and Colorado
Potential Effects of Four Flaming Gorge Dam Hydropower Operational Scenarios on the Fishes of the Green River, Utah and Colorado - Page 1
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Object Description
Rating
Title
Potential
Effects
of
Four
Flaming
Gorge
Dam
Hydropower
Operational
Scenarios
on the
Fishes
of the
Green
River
,
Utah
and
Colorado
Description
Report
by
I
.
Hlohowskyj
and
J
.
W
.
Hayse
that
uses
aerial
videography
and
modeling
to
evaluate
the
impacts
of
four
hydropower
operational
scenarios
at
Flaming
Gorge
Dam
,
Utah
, on
trout
and
native
fishes
in the
Green
River
,
Utah
and
Colorado
.
Abstract
Aerial
videography
and
modeling
were
used
to
evaluate
the
impacts
of
four
hydropower
operational
scenarios
at
Flaming
Gorge
Dam
,
Utah
, on
trout
and
native
fishes
in the
Green
River
,
Utah
and
Colorado
. The
four
operational
scenarios
studied
were
year-round
high
fluctuations
,
seasonally
adjusted
high
fluctuations
,
seasonally
adjusted
moderate
fluctuations
, and
seasonally
adjusted
steady
flows
.
Impacts
on
trout
were
evaluated
by
examining
differences
among
scenarios
in the
areas
of
inundated
substrates
that
serve
as
spawning
and
feeding
habitat
.
All
scenarios
would
provide
at
least
23
acres
per
mile
of
habitat
for
spawning
and
food
production
;
seasonally
adjusted
operations
would
provide
additional
areas
during
periods
of
sustained
high
release
.
Seasonally
adjusted
high
fluctuations
would
increase
inundated
areas
by
12
to
26%
for a
short
period
in
winter
and
spring
, but
food
production
and
reproduction
would not be
expected
to
increase
.
Seasonally
adjusted
moderate
fluctuations
and
steady
flows
would
produce
similar
increases
in
area
, but the
longer
period
of
inundation
could
also
result
in
increased
food
production
and
provide
additional
spawning
sites
for
trout
.
Impacts
on
native
fishes
were
assessed
by
examining
daily
changes
in
backwater
nursery
areas
.
Compared
with
year-round
high
fluctuations
, the
daily
changes
in
backwater
area
would
decrease
by
about
47
,
89
, and
100%
under
the
seasonally
adjusted
high
fluctuation
,
moderate
fluctuation
, and
steady
flow
scenarios
,
respectively
.
Similarly
,
daily
stage
fluctuations
during
the
nursery
period
would
decrease
by
72
,
89
, and
100%
under
the
seasonally
adjusted
high
fluctuation
,
moderate
fluctuation
, and
steady
flow
scenarios
,
respectively
. These
reductions
in
daily
fluctuations
in
backwater
area
and
stage
would
improve
conditions
in
nursery
habitats
and
could
in
turn
improve
recruitment
and
overwinter
survival
.
Introduced
fish
species
could
also
benefit
from the
seasonally
adjusted
operational
scenarios
.
Subject
Hydroelectirc power plants -- Environmental aspects -- Green River (Wyo.-Utah)
Fishes -- Effect of dams on -- Green River (Wyo.-Utah)
Fishes -- Effect of water levels on -- Green River (Wyo.-Utah)
Fishes -- Effect of habitat modification on -- Green River (Wyo.-Utah)
Flaming Gorge Reservoir (Wyo.-Utah)
United States -- Western Area Power Administration
Creator
Hlohowskyj, I. (Ihor)
Hayse, J. W. (John William)
Argonne National Laboratory. Environmental Assessment Division
United States. Western Area Power Administration
Publisher
Made available by: Utah State University, Merrill-Cazier Library
Language
en
Rights
This is a government document and may be used without restriction.
Date Digital
2007-11-07
Material Type
Reports
Government documents
Electronic books
Type
Text
Format
Text/pdf
Conversion Specifications
Pdf file uploaded from USU Government Documents Collection.
Identifier
DE96003921.pdf
Search Date
1995-09
Description
Title
Potential
Effects
of
Four
Flaming
Gorge
Dam
Hydropower
Operational
Scenarios
on the
Fishes
of the
Green
River
,
Utah
and
Colorado
-
Page
1
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Potential Effects of Four Flaming Gorge Dam Hydropower Operational Scenarios on the Fishes of the Green River, Utah and Colorado - Page 1
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