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<br />!. <br />~ <br />t <br />~ <br /> <br />Table 2. Mid-June warming in Grand Canyon (deg AT represents warming above CRBD) <br /> <br /> CRBD CRLF R061 R087 R226 <br />Week Discharge <br />beginning T T AT T AT T AT T AT (efs) <br />12JUN94 8.5 9.6 1.06 11.8 3.30 13.4 4.86 17.8 9.27 10631 <br />181UN95 9.1 9.3 0.20 10.8 1.70 12.0 2.84 14.6 5.51 16956 <br />161UN96 9.4 9.9 0.52 11.8 2.33 12.9 3.51 15.9 6.42 17189 <br />151UN97 8.6 9.0 0.44 10.3 1.70 11.1 2.51 13.5 4.88 26111 <br />14JUN98 9.0 9.4 0.32 11.l 2.00 18456 <br />13JUN99 9.2 9.6 0.37 11.4 2.26 12.4 3.22 16.0 6.77 16599 <br />18JUNOO 9.5 10.4 0.93 13.3 3.79 14.7 5.23 19.5 10.03 8008 <br /> <br />"I <br /> <br />'I <br /> <br />" <br /> <br />:.,"'. <br /> <br />/ <br /> <br />A regression of mid-June Diamond Creek warming rates with discharge levels (Table 2) <br />is shown in Figure 8, The number of kilometers needed for an increase of 1 deg C ranges <br />from 39 at 8000 cfs to 79 at 26000 cfs. Kom andVemieu (1998) have previously <br />estimated warming rates at 48 kmldeg C, using an average warming of 8.1 deg C at <br />Diamond Creek during the month of June. Ferrari (1987) reported a model prediction of <br />118 kmldeg C, based on 6 deg F of warming in 241 miles. Miller (1998) 57.5 kmldeg C <br />for June 1991 based on a regression of all Grand Canyon temperatures from that period. <br />None of these estimates have included the effect of discharge levels on warming rates, <br /> <br />:.'. <br /> <br />l. <br /> <br />110 <br /> <br />'- . <br /> ~ "- <br /> ..... <br /> '" <br /> .-...... "'- <br /> . <br /> . '" <br /> '-- <br /> ...... <br /> '" <br /> <br />au <br /> <br />~ ... <br />!< <br /> <br />., <br />". <br /> <br />11.0 <br /> <br />au <br /> <br />is <br />I '.0 <br />I B.O <br />J 7.0 <br />i '.0 <br /> <br />.s.1 is <br /> <br />48.8 I <br />1iS.4 I <br />'4.7 f <br /> <br />.,!.... <br /> <br />..;.- <br /> <br />~.:":J. <br />~\ <br />....; <br /> <br />8.0 7711 <br /> <br />4.0 '7.0 <br />IIlOO 1lOOO 1!O1lll 14000 18000 18000 10ll0ll ll2OllO 240llIl aeooo _ <br /> <br />-. ~ Md-.lJno a_go (1:11) <br /> <br />Figure 8 Warming at various discharge levels, WY 1994 to WY 2000 <br /> <br />10/25/00 <br /> <br />DRAFT <br /> <br />11 <br />