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Last modified
7/14/2009 5:02:32 PM
Creation date
5/17/2009 11:02:50 PM
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UCREFRP
UCREFRP Catalog Number
8086
Author
Valdez, R. A. and B. R. Cowdell.
Title
Lake Powell Inflow Study. Annual Summary Report - 1993.
USFW Year
1994.
USFW - Doc Type
384-1,
Copyright Material
NO
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<br /> <br />Increased numbers of young Colorado squawfish in the inflow following spring runoff and rain induced freshets <br />lead to the hypothesis that large numbers of young (age 0 and 1) Colorado squawfish are being transported <br />annually into this inflow. The survival of these fish is believed to be low because of the small amount of <br />nursery habitat (i.e., backwaters) and the large number of fish predators in Lake Powell. It is also possible <br />that larval razorback suckers, hatched in the upper Green River, may also be transported into Lake Powell <br />and lost from the system because of a lack of flooded bottomlands and abundance of predators in the inflow. <br /> <br />2.0 STUDY AREA <br /> <br />This investigation was conducted on the Colorado River inflow to Lake Powell in Utah, from Imperial Canyon <br />(RM 200) to the Rite Bridge (RM 170) (Figure 1). Access to this area was by motor boat from Rite Marina. <br />All river miles (RM) referred to in this report are from Belknap's Canyonlands River Guide (Belknap et a!. <br />1974). A detailed map of the Colorado River inflow to Lake Powell is available in this guide. <br /> <br />r' . <br />CAIIYONI>>IOS r' . - <br />NATIONAl. _ .-' I <br />PARK r _...; <br />. . <br />I.J <br /> <br />I <br />r' <br /> <br />r .1 <br />.... <br />I CLEN CANYON " <br />I~TIONAL . <br />I RECREATION AREA -: <br /> <br />._.J <br />._.J <br />I <br />I <br /> <br />L., <br />L._. <br />I <br />'-'( <br />I <br />I <br />, <br />-'1 <br /> <br />.J <br />I <br /> <br />L... <br />I <br />I <br /> <br />.... J <br /> <br />I <br />r' <br />,-.I <br />I <br /> <br />Study <br />Area <br />r- <br />I <br /> <br />~ <br />N <br />~ <br /> <br />5 <br />. <br />t.lu.. <br /> <br />10 <br />, <br /> <br />o <br />, <br /> <br />Figure 1. General location of the Lake Powell inflow study area. <br /> <br />2 <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />I <br />I <br />I <br />I <br />
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