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<br />Final Report <br /> <br />3-7 <br /> <br />_ 1900 <br />E <br />- 1800 <br /> <br />Reach 3 <br /> <br />Q) <br />> <br />Q) 1700 <br />...J <br />ftS <br />Q) <br />en <br />Q) <br />> <br />o <br />Jl <br />< <br /> <br />1600 <br /> <br />1500 <br /> <br />1400 <br /> <br /> <br />~ 1300 <br />~ <br />~ 1200 <br />Q) <br />w 1100 <br /> <br />o <br /> <br />100 <br /> <br />200 <br /> <br />300 <br /> <br />September 2000 <br /> <br />Reach 2 <br /> <br />Reach 1 <br /> <br /> <br />400 <br /> <br />500 <br /> <br />700 <br /> <br />600 <br /> <br />Distance Upstream of the Colorado River Confluence (km) <br /> <br />Figure 3.2.-Longitudunal profile of the Green River between the Colorado River confluence <br />and Flaming Gorge Dam. <br /> <br />adjacent steep-walled canyon topography. Except for usuall y minor flow contributions from tributary <br />streams, flow in Reach 1 is completely regulated by Flaming Gorge Dam. The mean annual <br />discharge (about 60.3 m3/s) has not been affected by Flaming Gorge Dam operations, but the pattern <br />of flow has been changed. Prior to regulation, the <br />seasonal flow pattern for Reach 1 featured high spring <br />flows and low summer, autumn, and winter base flows. Green River Reach Designations Used in <br />Releases for power generation have resulted in This Report <br />relatively uniform monthly release volumes but <br />significant within-day variation when compared with <br />the pre-dam condition (Section 3.4). <br /> <br />Downstream from Flaming Gorge Dam, the <br />Green River flows through Red Canyon for about <br />19 km. This portion of Reach 1 has been armored since <br />construction of the dam, and the relatively coarse bed <br />material inhibits further downcutting of the riverbed. <br />Because the dam eliminates sediment contributions <br />from upstream reaches, sediment-source areas for Red <br />Canyon are limited to small tributary streams (e.g., Red <br /> <br />~ <br /> <br />Reach 1 - Flaming Gorge Dam to the <br />Yampa River confluence (river kilometer <br />[RK] 555.1 to 659.8). Flow in this reach is <br />measured at the USGS gage near <br />Greendale, Utah. <br /> <br />Reach 2 - Yampa River confluence to <br />White River confluence (RK 396.2 to <br />555.1). Flow in this reach is measured at <br />the USGS gage near Jensen, Utah. <br /> <br />Reach 3 - White River confluence to <br />Colorado River (RK 0 to 396.2). Flow in <br />this reach is measured at the USGS gage <br />near Green River, Utah. <br />