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<br />(-0 <br />1"- <br />co <br />C",l <br /> <br />which indicates that during 6 years of tho porioe 1921-1937 the <br /> <br />reservoir could not be fillee; unless cUversicns were kept mterially <br /> <br />lower than they have been in the past, while in two 9,fditional years <br /> <br />the r.9.rgin would be small. <br /> <br />This, however, offers nc sericus difficulty. It is now <br /> <br />the practice to start diversicm nefore the ~rowing senson really <br /> <br />starts because water is then available in abundance to offset the <br /> <br />lack of flow later in the season. Moreover thi.s early irrigatic'n <br /> <br />is done at rates ~mich Dust be harr.ful to pl~nt grcwth if not to <br /> <br />the soil. Vfuen stored water is available it will be natural to <br /> <br />store the early runoff; to defer irrigation until plants are ready <br /> <br />for growth; 9.nc even, if necessary, to curtail early civersions to <br /> <br />assure ~ full reservoir. Thus both natural ccn0itions and self- <br /> <br />interest will work for the n'~xinum use 0f this storage. <br /> <br />An accurate ceterninaticn of storable flow at Haystack <br /> <br />Reservoir cannot be l'Jai'e frCl'l the few ye,ars of strean flow record <br /> <br />available. Use has been Daoe of the nore conplete record of diver- <br /> <br />siens, which ccntains the DOSt positive fact known, to-wit: the <br /> <br />time at which stream flow falls belOW civersion requirements; <br /> <br />fr08 this uate and its relation to stream flows of record there is <br /> <br />obtained the relation between this date and storable flow as shown <br /> <br />on Plate 4, by Curves 1. 2 and 3. <br /> <br />49 <br />