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Gunnison River /Aspinall Unit Temperature Analysis -Phase I <br />Page 14 <br />did not significantly impact the thermal structure of the reservoir (one should use a model <br />to determine this), release temperatures could increase by approximately 3 °C in late <br />summer for wet years (based on 1997 data) and 5 °C for dry years (based on 2000 data). <br />4.2 Data Analysis by Reservoir -Morrow Point Reservoir <br />4.2.1 Physical Data -- Morphometry, Hydrology and Setting <br />Morrow Point Reservoir is the second reservoir in the Aspinall Unit and is the primary <br />hydropower producer. It is a long, narrow, river-run reservoir, surrounded by steep cliffs <br />(NPS, 1996). The average width is about 1.5% of reservoir length. Although there are a <br />couple of minor tributaries, the vast majority of the inflow comes from Blue Mesa <br />Reservoir releases (88% since its closure). Figure 11 shows locations of data collection <br />sites in the reservoir. Its morphology and hydrology is summarized in Table 2. <br />f / <br />/ ~ <br />° ' , l~~yP vQ- <br />`~~ <br />~~ <br />GJ <br />SAPI <br />~~ <br />yy~s '°', <br />0 1 , ,~ <br />2~ anaR~ ' ~_~_' <br />MOR2 ~- <br />~,:~ iY _"_ GUNNISON R <br />Q~ Q~ <br />~qp Morrow Point Reservoir ~ <br />~°ti ~ <br />~' p u <br />. =4r <br />a <br />1 <br />w.. ~`~-.E.. <br />~i u e i z 1 <br />~~s ~ ~.! <br />Figure 11. Morrow Point Reservoir with Data Collection Sites. <br />Hydrosphere Resource Consultants <br />