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<br />< ". <br />,,-.. ' <br /> <br />. <br /> <br />.,.. <br /> <br />ll'j <br />1- <br /> <br />- <br /> <br />r <br /> <br />. <br />, . . <br /> <br />.' <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />PERIOD OF STUDY <br /> <br />Yampa River basin streamflow data were analyzed for the <br />period of record (1917 - 1982) to identify drought, periods. <br />Based on ~e historic flows, an analysis period of 1951 through <br />1978 was selected. This study period encompasses the moderate to <br />severe drought of 1963 through 1967. A statistical analysis of <br />USGS gaging data reflected that the 1963 year was a dry year that <br />had a 1 in 20 chance of.occurring, 1964 was a 1 in .. dry year,' <br />1965 was 51 igh tl Y be low normal wi th a 1 in 2 chance of <br />occurrence, 1966 was a 1 in 10 dry year and 1967 was a 1 in 3 dry <br />year. The 1951 to 1978 analysis period also coincided with the <br />duration that streamflow gaging has occurred on the Little Snake" <br />'River. The extended 28 year sequential analysis allot-led the' <br />determination ,of carryover reservoir storage prior to the 1963 _ <br />1967 drought, and alsQ provided the opportunity to analyze the <br />recovery of reservoir storage following drought periods. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />.' <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />, <br />