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<br />" <br /> <br />40 <br /> <br />areas with 11 ttle or no current, many larger ti sh were collected in <br />m1d.chaJme1. with electl"o-t1sb1.ng gear, seines, and gill nets. <br /> <br />stre.. temperature variations <br />Major ditterenoes in stream-now patterns ot the Green River <br />at Greend.ale, Utah, and the Yampa River at l'J&ybell, Colorado, during <br />1961 and 1962 are shown in Figure 8. VOlUM ot water now wa. con.. <br />siderably greater in the Green River during the monthl5 ot June, July, <br />and August, The earlier reduotion in run-ott in the Yampa R1 Vel' <br />resulted in higher water teJllperatures tor a greater portion of the year. <br />This variation in water temperatures between the Green and <br />Yampa r1vers was measured at Echo Park during the month ot August, 1962 <br />(i1gure 16), The average ot the tomperature :measurements in the Green <br />River dur1111 this month was tound to be two degrees oooler than the <br />averaSe ot tho.. in the Yampa River. All oomparative t811l.perature <br />measurements were made within one hour ot eaoh other, and were made <br />near1.7 w8l'ydq. Temperature oompariaons were made at ditterent hours <br />on ditterat days. <br /> <br />stream turbid1 ty variations <br />Turbidity was observed greater in the GreeD Uiver than in <br />the Yampa during the low run-ott seasons. The Yampa River was <br />characterized by very slow currents dur1ng low water periods, while <br />current. in the Green River were moderate to fast in JOOst places. <br />Observations ot the variation 1n turbidity (indicated by variable <br />depths of visibility) were made in Eoho Park during August, 1962. <br />MaYillDlJII depth or v18ib1l1ty in the Green River was never observed to <br />be greater than one toot. In the Yampa River howover, maxiD11D1 depth <br /> <br />