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<br />SEQI~E~T L0AOI~GS <br /> <br />~ <br />C) <br />~ <br />~ <br /> <br />Construction. mining. and r~creational lana use disturbs and <br /> <br />alters tne. veg~tation. soil profll~. and lana slope. <br /> <br />each of these <br /> <br />chanyes may tend to increase erosion unless specific control measures <br /> <br />are taken. <br /> <br />In areas wnere land disturoance is extensive ana erosion <br /> <br />uncontrolled. the supply of sediment to adjacent Stream channels <br /> <br />may increase substantially tne quantity of sediment transported oy <br /> <br />the streams. <br /> <br />Antici~ated en~rgy-resQurce development in the Upper <br /> <br />~olorado Rivar Basin will aisturb large areas of 1ana dna may <br /> <br />increase the sediment load of some Streams. <br /> <br />Tne potential ma~nitudes <br /> <br />of increased sediment loadin]s in the upper ColoradO River oasin <br /> <br />were examined oy constructin] annual suspended-sediment ouagets <br /> <br />for the si. study reaches. <br /> <br />~ean-annual suspended-sediment loads <br /> <br />were then computed for tne mainstem and tributary gaying stations <br /> <br />in tne study reaches by either of two methods, aepending upon the <br /> <br />number of days that the sediment concentration had been measured <br /> <br />and the daily-sediment loads calculated. <br /> <br />At tnose 9agin9 stations <br /> <br />wnere daily seaiment loadS had been determinea for a periOd of 5 <br /> <br />or more years. the mean of tne sum of annual sediment loadS was <br /> <br />computed and was taken to De an estimate of the longer term medn- <br /> <br />annual sediment load. <br /> <br />At most gaging stations. however. the numoer <br /> <br />of measured daily sediment loads was much fewer than required for <br /> <br />this method. <br /> <br />Ther~fore. a relation between daily sediment loaa <br /> <br />and daily stream discharge was calculated oy linear resression of <br /> <br />the log-transformed data. <br /> <br />SUCh relations were only useo wnen at <br /> <br />l4 <br />