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<br />314 <br /> <br />'. . C....J...08o <br />_. 1.\ <br />~.. ..-/.,....,...."\"....,../\,,r"'-/ <br />" . <br />'. ~ <br />J . <br />'-..., <br />'t, <br /><\. <br />~"\!2r <br />J> <br />..'"\.. <br />? <br />-~ <br />\... <br />.'~.' ,._..iI'.~ <br />I....... . <br />.. ) <br />~ <br />I <br /> <br />:--,' <br /> <br />EXPLANATION <br /> <br />I' STREAMFLOW GAGING <br />STATION AND SEDI- <br />MENT-SAMPLING <br />SITE - Number by <br />symbol refers to Table I <br /> <br /> <br />( <br /> <br />~. <br /> <br />\-- -., <br />. '\ <br />-)' '-. <br /> <br />f <br />J <br />410----n~t8Wft>% <br />I' f<J~ <br />~ <br />. ~ <br /> <br />( Deerlodge <br />. Park <br />L.-.._........-..,. <br /> <br />~..^. <br /> <br />.'\t <br />Base from U.S. Geolo!,!:ical Survey"l.:.. <br />1:500.000 Slale base map. 1969 ~..':,.-... <br />~ ""- "I..o--'.""""-..::~./"\. <br />? 1,0 ~O 3,0 KILOMETERS '\.-. <br /> <br />40~l..-v.. <br /> <br />Fig. 2. Location of streamflow-gaging stations and sediment-sampling sites used in the <br />study. <br /> <br />Little Snake River subbasin has an area of 9,700 km2 and the Yampa River <br />subbasin has an area of 10,100 km2. The eastern part of the basin is moun- <br />tainous with a maximum elevation of 3,780 m. Mean-annual precipitation <br />ranges from 600 to 1,250 mm/yr., and the vegetation is a pin~pruce forest. <br />Westward across the basin, the elevation decreases to 1,530 m at Deerlodge <br />Park. Mean-annual precipitation in the central and western parts of the Yam- <br />pa River basin ranges from 200 to 360 mm/yr. Here the vegetation is sparse <br />grass and sagebrush. <br />Fifteen gaging stations were selected for study. The criteria for selection <br />were a minimum of 5 years of streamflow record and 25 measured suspended- <br />sediment concentrations covering the range of discharges. Furthermore, it is <br /> <br />t <br /> <br />. <br />..J <br />I <br />