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I: li.i I'j ~i 7 2. The double~mass plot comparing Julesburg with these Inf'o~ shows much the same pattern as the previous analysis. The period from 1942 through 1952 shows a trend towards an Increasing proportion of flow at Jutes- burg compared to the long-term average. During the drought years of the early 195015, 1952 through 1956, the trend was reversed and the outflow at Jules- burg became proportionately less. Since 1956 very I ittle change In trend is discernible. 3. Double-mass curves drawn for Individual months show In general a decreasing proportion of flow at Julesburg for the period 1952 through 1961. The months of November, December, January, April, May, July, August and September show this trend lasting until the more recent years of 1964 to 1966. The remaining n~nths show either n0 discernible trend during the last six to eight years or a relationship comparable to the long-term relationship. Equation Corre I at ion Month (flows in acre-feet) Coefficient January J u lesburg = 1.94 (Denve r + meas u red inflow) - 1),660 0.79 February Julesburg = 1,85 (Denve r + measured inflow) 15,760 0.78 March Julesburg = 1.56 (Denver + measured inflow) 15,630 0.90 April Julesburg = 0.51 (Denver + measured inflow) + 1,730 0.85 May Julesburg = 0.81 (Denver + meas u red inflow) 42.140 0.86 June Julesburg = 0.71 (Denver + measured inflow) )4,580 0.92 July Julesburg = 0.42 (Oenvc r + meas u red inflow) 1),180 0.69 August Julesburg = 0.26 (Denver + measured inflow) 6,580 0.77 S ep t erobe r J ul es bu rg = 0.46 (Denve r + measured inf low) - 7,340 0.89 October Julesburg = 0.77 (Denver + measured inflow) 10,300 0.81 Novembe r Julesburg = 0.92 (Denver + measured inflow) 11,620 0.82 December Julesburg = 1.40 (Denver + measured inflow) 18,860 0.84 COMPAR I SON OF MOVING AVERAGE ANALYSES OF JULES BURG FLOW WITH THAT OF UPSTREAM STATIONS A la-year movi~g ~verage analysis from 1936 through 1966 for Julesburg shows a pattern very similar to patterns of the same period for the Balzac., Kersey, Henderson, and Denver stations on the main stem of the Platte. This pattern is one which starts low, then rises rapidly during the la-year period.. ending in 1942 to 1951. After 1951 the pattern drops to 50,000 ~cre-feet above the averages of the 1930's, reaching ~ low with the IO-year average in 1959. After 1959 the tendency for the n~ving average h~~ been upward again, reaching a level about 0.8 of the peak experienced in the ten years ending in 1951. The patterns at Balzac and Kersey on a 10-year moving average basis are alnost identical to that of Julesburg, except that the pull dm~n in averages during the 1954 to 1959 period was not as severe at Kersey as at the other two stat ions.