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Last modified
7/14/2009 5:02:28 PM
Creation date
5/22/2009 4:47:33 PM
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UCREFRP
UCREFRP Catalog Number
6006
Author
Holden, P. B. and L. W. Crist.
Title
Documentation of Changes in the Macroinvertebrate and Fish Populations in the Green River Due to Inlet Modification of Flaming Gorge Dam
USFW Year
1981.
USFW - Doc Type
Final Report.
Copyright Material
NO
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<br />-4- <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />All macroinvertebrate samples were taken from similar habitats; cobble, <br />riffle areas. <br />Fishes were sampled at Lodore, Alcove Brook, Echo Park (mouth of <br />Yampa River), Is 1 and Park, and Jens en in the Green River and at Lower <br />Yampa and Lily Park in the Yampa River (Figure 1). A general descrip- <br />tion of each of these sites follows; sketches of the stations are in <br />Appendix I. <br />Lodore (46 MBD) <br />The river at this point is rather slow. Bottom substrate is <br />almost 100% sand. At low flows the river is braided with many <br />sand bar islands; at high flows it is bounded by high banks. <br />Habitats are not very di verse; runs are predomi nant, wi th few <br />eddi es and backwaters. Duri ng hi gh flows, the backwaters are <br />washed out. Considerable daily fluctuation due to Flaming <br />Gorge releases occurs at this station. The station is 1.2 <br />mil es long. <br />Alcove Brook (61 MBD) <br />This station, in the lower portion of Lodore Canyon, exhibits a <br />vari ety of habitat types. The substrate is approximate ly 75% <br />cobb 1 e-rubb 1 e and 25% sand. Poo 1 sand riffl es are common. At <br />low flows, cobble bars become exposed. Banks are often steep <br />rock cliffs. Backwaters are relatively scarce. Considerable <br />daily fluctuations due to Flaming Gorge release occurs at this <br />station. The station is 1.0 miles long. <br />
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