Water Users Investigate Klamath River
Flows: Biologist Warns "Increased Summer
Flows Could Harm Salmon" - Concern
over Waterfowl Impacts also Expressed by
Conservation Group
Contact: Dan Keppen
August 7, 2002
(541)-883-6100
Klamath, Oregon - The recent announcement by the
U.S. Bureau of Reclamation (Reclamation) that the
present water year had been changed from
"below-average" to "dry" for
the
federal Klamath Project has generated criticism
from environmentalists and
downstream tribal interests. In a "below
average" year, August flows through
Iron Gate Dam are set at about 1,000 cubic feet
per second (cfs), but with
the change to a "dry" year, the flows
have been reduced to about 650 cfs.
Biologists working for the Klamath Water Users
Association (KWUA) conducted
surveys last week between Iron Gate and Happy
Camp to assess flow conditions
in the river.
Meanwhile, environmentalists and tribes are
pressing for more Klamath River
flows to support salmon.
Project irrigators question the wisdom of
releasing additional stored water
downstream at this time, particularly when a
recent study completed by the
National Academy of Sciences (NAS) found that
higher flows "may work to the
disadvantage of the coho population" in
summer months. Water users are
concerned that a repeat of the disaster that
occurred in 1994 will occur.
That year, despite warnings from KWUA biologists,
federal agencies increased
summer flows, which prematurely attracted
fall-run chinook salmon to an upper
area of the river where natural conditions were
hostile to their health. The
net result of the increased flows during late
August of that year could have
ultimately been detrimental to 1994 fall-run
Chinook in the Klamath River.
"Dumping too much warm water in the wrong
place at the wrong time and for all
the wrong reasons will not gain biological
benefit. In fact, it may very well
be detrimental to the fish," said Dave
Vogel, a fisheries biologist from Red
Bluff.
Reclamation continues to meet its contracts to
provide water to farms
upstream, which have taken measures to conserve
water and make up water sent
downstream earlier this summer to meet tribal
trust obligations. However,
tribal interests are now holding up the fall-run
chinook as an example of a
tribal trust need that should be addressed with
Klamath Project water.
Spokespersons for downstream tribes contend that
their fishing rights rise
above the water rights of irrigators, and that
irrigators should be cut back
. Local water users have a different view.
"If downstream interests want more water
from the Klamath Project, they are
actually looking at the wildlife refuges, which
have the junior water rights
within the Klamath Project," said Paul
Simmons, attorney for KWUA. "What they
are really arguing for is to shut off the supply
to the national wildlife
refuges." KWUA believes the refuges should
be protected at this time of the
year, a concern shared by conservation groups.
The California Waterfowl Association (CWA) and
other conservation groups are
concerned that reducing refuge supplies at this
point will have a significant
negative impact on migratory waterfowl
populations and other wildlife.
"Cutting back water deliveries to the
Klamath National Wildlife Refuge (NWR)
Complex at this critical point in the year will
have a devastating impact on
waterfowl and the more than 400 other species of
wildlife which depend upon
Klamath wetlands," said Bill Gaines,
Director of Government Affairs for CWA.
According to CWA, the Upper Klamath Basin is the
most important waterfowl
staging area in North America. "In a
matter of days, and over the course of
the next several weeks, 20 million or more ducks,
geese and swans will
descend upon Upper Klamath Basin wetlands to feed
and rest up for the
remainder of their migration south to their
wintering grounds", said Gaines.
"Adequate water deliveries to the managed
wetlands on the Klamath NWR Complex
are integral to the health of our continental
waterfowl populations. Reducing
refuge water deliveries at this critical time of
year, simply to address the
needs of a single fish species, would be a highly
irresponsible resource
decision."
KWUA maintains that the current outcry for higher
downstream releases simply
resurrects an old approach, one that has been
proven not to work. They point
to the recent NAS interim report prepared for the
Klamath Basin that found
"factors other than dry-year flows appear to
be limiting to survival and
maintenance of coho." KWUA biologists have
also suggested several other
physical and biological factors have an
overriding influence on the overall
fall-run Chinook migration and spawning success
in the Klamath River. (See
attached).
The NAS report warned that reduction in main-stem
flows below the levels that
were seen between 1990-2000 could not be
justified. In 1992 and 1994, flows
below Iron Gate Dam dropped to near 400 cfs and
below 600 cfs, respectively.
Iron Gate low flows for this month are not
expected to drop below 650 cfs.
Klamath Irrigation District Manager Dave Solem
points out that current
Klamath River flows are supplemented by releases
of water stored by the
Klamath Project. "Without the storage
provided by Project reservoirs, flows
would be lower than they are now", said
Solem. He adds "Unlike other
interests, irrigation water users have never
demanded all the water in the
Basin."
"This is yet another example of the recent
myopic focus placed on the Klamath
Project alone to solve the complex problems of a
10-million acre watershed",
said Dan Keppen, KWUA Executive Director.
"We understand the importance the
downstream tribes place on harvesting fall-run
Chinook salmon. All interests
in the Basin should be cooperatively developing
meaningful restoration
actions to improve fishery conditions so that
tribal harvest goals are not
short-changed. Unfortunately, increasing flows at
this time of the year has
not been proven to be beneficial to fall-run on
the Klamath." #
Additional Information:
· Factors Affecting Salmon in the Klamath River
· Summary of "Preliminary Assessment of
Increased Klamath River Flows for
Salmon During the Late Summer and Fall of
1994"
· Excerpt from "Scientific Evaluation of
Biological Opinions on Endangered
and Threatened Fishes in the Klamath River
Basin". Interim Report from the
Committee on Endangered and Threatened Fishes in
the Klamath River Basin
(Natural Research Council, National Academy of
Sciences)
Factors Affecting Salmon in the Klamath River
In the past few years, we have reviewed thousands
of pages of documents to
determine if the best available scientific data
and information suggest that
the recent historical flow regime in the mainstem
Klamath River has been a
significant factor affecting Klamath River
fishery resources. These
documents included scientific peer-reviewed
literature, state and federal
agency documents and reports, and investigations
encompassing many decades of
research on the Klamath River. This
extensive review clearly revealed that
numerous factors other than the recent historical
mainstem flow regime at
Iron Gate Dam have affected Klamath River fishery
resources.
The U.S. Fish and Wildlife Service (USFWS) have
described the most important
eight factors as "most frequently referred
to with regard to recent
population declines" of anadromous fish in
the Klamath River. Those factors
are: 1) Over fishing; 2) Logging; 3) Trinity
River transbasin diversion; 4)
Irrigation diversions in lower Klamath
tributaries; 5) 1964 flood; 6)
1976-1977 drought; 7) Sea lion predation; and 8)
Brown trout predation.
None of the documents reviewed provided any
supporting scientific information
or data suggesting that the recent historical
mainstem flow regime at Iron
Gate Dam is a significant factor adversely
affecting fishery resources. To
the contrary, all of the available information
provides compelling evidence
that other factors are far more important in
affecting fish populations than
the recent historical Iron Gate Dam flow regime.
For example, the multi-million dollar,
multi-agency Long-Range Plan for
restoring Klamath River anadromous fish addresses
the issue of Iron Gate Dam
releases and potential effects on salmonids in a
passive manner. This is
highly instructive because, despite all the
efforts and research accomplished
to date on the Klamath River, no entity has
developed any scientific data to
support the premise that specific Iron Gate
releases over the past several
decades has been a significant factor limiting
Klamath River salmonids.
The 1994 Study: "Preliminary Assessment of
Increased Klamath River Flows for
Salmon During the Late Summer and Fall of
1994"
An investigation was conducted during late summer
and early fall of 1994 to
assess the effects of increased flows on fall-run
Chinook salmon in the
mainstem Klamath River downstream of Iron Gate
Dam. The U.S. Bureau of
Reclamation increased river flows in late August
1994 in response to demands
by Lower Klamath River Indian Tribes. Because of
the anticipated significant
adverse impact to limited water supplies in the
upper Klamath River basin and
the concern for potential adverse impacts to
salmon as a result of the
decision to increase mainstem river flows, an
investigation was initiated by
KWUA and completed by Vogel Environmental
Services in November 1994.
Results of the investigation demonstrated that
the anticipated benefits to
salmon resulting from increased flows from Iron
Gate Dam in late August were
not realized. The net result of the increased
flows during late August could
have been "ultimately detrimental to 1994
fall-run Chinook in the Klamath
River."
The study found:
· "There was no evidence of appreciably
improved water temperatures for
salmon resulting from increased, sustained Iron
Gate flows in late August and
early September."
· The increase in flows was found to have
"no temperature-related benefit"
was "detrimental" to the 1994 fall
Chinook salmon run.
· Initial increased reservoir releases appear to
have slightly increased
water temperatures in the Iron Gate Dam releases.
· Despite the substantial flow increase in late
August, there were no
portions of the upper river reaches where optimal
temperatures for salmon
existed during September.
Importantly, the study concluded "if
increased flows from Iron Gate Dam
during late August and early September resulted
in attracting more salmon up
the river at that time, more fish were probably
exposed to unfavorable
thermal conditions for maturing salmon than if
the flows had been increased
later in the season." The study determined
that, despite the substantial flow
increase in late August, there were no portions
of the upper river reaches
where optimal temperatures for salmon existed
during September. The study
suggested that if flow increases were found to be
necessary to benefit salmon
during the fall, those increases should have
occurred during late September
or October, after normal seasonal declines in air
temperatures cooled river
flows.
Excerpts from May 2002 "Scientific
Evaluation of Biological Opinions on
Endangered and Threatened Fishes in the Klamath
River Basin"
Interim Report from the Natural Research
CouncilCommittee on Endangered and
Threatened Fishes in the Klamath River Basin
· "Water temperature is a major concern for
the welfare of the Klamath Basin
coho salmon. Summer temperatures appear to be
especially critical."
· "Summer temperatures in the Klamath River
are suboptimal or even lethal to
juveniles. High temperatures are the result of
reduced flow in the main stem
and in tributaries as a result of diversions,
warming of water in lakes prior
to its flow in the main stem, and loss of
shading."
· "Modeling has shown that higher releases
of water to the main stem can
reduce water temperatures slightly, provided that
manipulation of flow itself
does not raise the base temperature. It is
unlikely, however, that the small
degree of cooling that could be accomplished in
this way would affect
survival of coho salmon because temperatures
could continue to be
suboptimal."
· "While the provision of additional flow
seems intuitively to be a prudent
measure for expanding habitat, the total habitat
expansion that is possible
given the limited amount of water that is
available in dry years is not
demonstrably of much importance to maintenance of
the population."
· "Factors other than dry-year low flows
appear to be limiting to survival
and maintenance of coho."
· "Higher flows may work to the
disadvantage of the coho population from July
through September if the source of augmentation
for flow is warmer than the
water to which it is added….the addition of
larger amounts of water from the
sequence of reservoirs above Iron Gate Dam may be
disadvantageous to the
fish."
· "Increased flows also could have a
detrimental effect on the availability
of thermal refugia. Thermal refugia created by
groundwater seepage and small
tributary flows may be most accessible and
extensive at low flows. Increase
in flows may reduce the size of these refugia by
causing more effective
mixing of the small amounts of locally derived
cool water with much larger
amounts of warm water from points upstream."
· "The available information provides
little support for benefits presumed to
occur through the increase of flows beyond those
of the last decade."
The Klamath Water Users Association is a
nonprofit corporation that has
represented Klamath Irrigation Project irrigators
since 1953. KWUA members
include rural irrigation districts and other
public agencies, as well as
private irrigation companies operating on both
sides of the California-Oregon
border.
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use without profit or payment for non-profit research and
educational purposes only. [Ref. http://www.law.cornell.edu/uscode/17/107.shtml]
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