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Last modified
7/14/2009 5:02:37 PM
Creation date
5/20/2009 1:35:18 PM
Metadata
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Template:
UCREFRP
UCREFRP Catalog Number
9658
Author
Schmidt, J. C. and K. L. Orchard.
Title
Report A - Geomorphic Analysis In Support of a Channel-Maintenance Flow Recommendation for the White River Near Watson, Utah Draft Report.
USFW Year
2002.
USFW - Doc Type
Logan, UT.
Copyright Material
NO
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<br />influence physical habitat features such as the size and frequency of eddies (Orchard and <br /> <br />SChmidtf1998)~ and the amount of fine-grained sediment located in the interstitial spaces <br /> <br />in gravel bars (Kondolf et al.!\987). To aid in the recovery of these fishes, the U.S. Fish <br /> <br />and Wildlife Service (USFWS), in 1987, initiated the Upper Colorado Recovery <br /> <br />Implementation Program (RIP). The program calls for the management of habitat using <br /> <br /> <br />"...instream flows at certain times, locations, and in certain quantities..." (USFWS,~987) <br /> <br />which promote the recovery of these species. As a part of this program, the Utah <br /> <br />Department of Wildlife Resources (UDWR) began work to assess flow requirements for <br /> <br />~ike(Y\.il~ 1\ 0 1,1.) <br />the Colorado \ltv.vfish in the White River, and identify those existing conditions which <br /> <br /> <br />may impede the recovery of the species (Lentschet a1.A 995). Much ofthe work <br /> <br />conducted by UDWR focused on the impact of Taylor Draw Dam, which was completed <br /> <br />in 1984. Lentsch et al. (1995) identified several probable changes in the annual <br /> <br />hydrograph of the White River that occurred after the completion of Taylor Draw Dam. <br /> <br />They divided the available period of gaging records for the White River near Watson, <br /> <br />Utah (station 09306500), into three time periods representing various degrees ofhurhan <br /> <br />llsage of the White River. The divisions were the early development period (1923 - <br /> <br />1945), the middle development period (1946 - 1978), and the post-Taylor Draw Dam <br /> <br />period (1985 - 1993). However, due to the short record after the completion of the dam <br /> <br /> <br />(9 years), and the failure to consider discharges between 1979 and 1984 when the Watson) lit-o \1 } <br /> <br />gage was not active, the results about the post-dam period were inconclusive. Previous <br /> <br />studies on the White River have observed that higher discharges modify habitat more so <br /> <br /> <br />than baseflow discharges (Chart^987), and that habitat diversity differs by reach (Miller <br /> <br /> <br />et a1.!i982), but specific flows ~maintain or improve habitat were not <br /> <br />5 <br />
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