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<br />Typically, a very wet year can have dry months, and a dry year can have a month or two of higher than <br />normal flow. <br /> <br />The inconsistencies of flow within a given year precluded the use of any statistical test, so a testing <br />methodology based upon comparing percentile data to the data sets was utilized. Annual and monthly <br />statistical flow values for the MaybeU gage at the 20th, 50th, and 80th percentiles were compared with the <br />data sets representing dry, average, and wet years. This process was repeated a number of times with <br />different sets of years until a set of years whose average approximately matched the percentile data was <br />identified (see USFWS, 1986). <br /> <br />The years averaged to represent dry conditions are 1931, 1955, and 1961. The years averaged to <br />represent average conditions are 1941, 1951, and 1956. The years averaged to represent wet conditions are <br />1932, 1962, and 1979. <br /> <br />Figures 4.~.6 show the representative dry, average, and wet conditions for the Mayben, Lily and <br />Deerlodge Park gages, respectively. Appendix B shows each representative condition plotted separately on <br />a logarithmic scale. <br /> <br /> <br /> 10000 <br /> 9000 <br /> 9000 ~ <br />III 7000 ~ <br /><i- <br />U <br />c <br /> 6000 <br />(II <br />0) <br />c. <br />0 5000 <br />.l: <br />U <br />III <br />C 4000 <br />:J) <br />0 3000 <br />c <br /> 2000 ~ <br /> 1000 <br /> 0 <br /> ~- I <br /> tolon Feb Mal" ApI'" <br /> -DJ""Y <br /> <br />1\ <br />{v ;1 <br />I : ,t <br />1 .',:' 1:/1 /\ <br /> <br />.1/ <br /> <br />~ l/\ <br /> <br />, y \ <br />I <br />, <br />'1\ \ <br />I, , <br />. , \ <br />I <br />, <br /> <br />Ii\ <br />II · <br />1 \ ~\I <br />I ': <br /> <br />I <br /> <br /> <br />~ <br /> <br />1 I <br />May dun tolu J Aug Sep Oct Nov <br />Month <br /> <br /> <br />Dee: <br /> <br />AveJ""oge <br /> <br />Wet <br /> <br />Figure 4.4 Representative years for the Yampa River at MaybeU. <br /> <br />4-6 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />I <br />I <br />I <br />I <br />t <br />