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<br />MAXIMUM <br /> <br />75TH PERCENTILE <br /> <br />MEDIAN <br />MEAN <br />25TH PERCENTILE <br /> <br />MINIMUM <br />39 NUMBER OF MEASUREMENTS <br /> <br /> SITE <br />N ~ "' '"'" '" :li ~ :s <br /> _N N ~ <br />~ ~ ~ ~~ ~ ~ ~ ~ <br /> I I I I I <br /> <br />35 <br /> <br />, , 1 I I I , . I I , I I I I 1 I I I <br />- <br /> - <br /> . . <br />- . <br /> . <br />f- I- <br /> 60,. - <br /> 3. <br />'~ '~ ~ ,~ 112 )fl7 <br /> , "- , , , , <br /> <br />a:w Z <br />Wu. 0 <br />~:J ~ <br />:>u <l: <br />>_u <br />'I- - <br />::!!<I: !!o <br />a::J '" <br /><l:0'" <br />~<5 <br />u <br /> <br />'" <br />~ 30 <br />~ <br />W <br />U <br />~ 25 <br />~ <br />Cl <br />w <br />C 20 <br />~ <br />ui <br />a: <br />:J '5 <br />I- <br />;2 <br />W <br />Q. <br />:::; 10 <br />w <br />I- <br />a: <br />w <br />!;( 5 <br />~ <br /> <br />a:WZ <br />W!:!::Q <br />I-..JI- <br /><l:U<l: <br />3:-U <br />,.....~ <br />C<l:- <br />..J:J'" <br />00'" <br />U<l::5 <br />u <br /> <br />o <br />9 12 15 18 21 2" 21 30 33 36 39 ~2 45. ~ 5f 5~ 57 60 63 86 69 <br />APPROXIMATE MILES DOWNSTREAM FROM DRAINAGE BOUNDARY <br /> <br />Note: Period of record for individual sitas <br />is variable. See (abIes 3 and 4. <br /> <br />Figure 10,--Statistical summary of downstream variations in water <br />temperature for Fountain Creek, available data, 1975-83. <br /> <br />Upstream from the confluence with Monument Creek, measurements of water <br />temperature at sites F12 and F15 ranged from 0 to about 25 oC (fig. 10). <br />Monthly variations in water temperature measured at site F12 are shown in <br />figure 11, Coldest temperatures measured at this site have occurred during <br />December and January; the median temperature was about 1,5 oC. Warmest tem- <br />peratures have occurred during July; the median temperature was about 18 oC. <br />These data indicate that water temperatures of Upper Fountain Creek rarely <br />exceed 20 oC, Water temperatures frequently exceed 20 oC during the summer <br />throughout Lower Fountain Creek as shown in figure 11 for sites F17 and F36, <br />At least 25 percent of the instantaneous water-temperature measurements at <br />each site on Lower Fountain Creek exceeds 20 oC (fig, 10), The water temper- <br />atures are warmer in Lower Fountain Creek because of warmer climate, inflow <br /> <br />22 <br />