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<br />Summer Storage Release Demands <br /> <br />D'~\n'l; ",","r .:. <br />A .l.~ '. "/ I" :~~.. v, 1\: !, """"' :.- <br />..........h.....!V~...i. .....l.... <br /> <br />c.-, <br /> <br />In examing summer storage events (~torage occuring after <br />the reservoir has been emptied), two factors need to be considered: <br />.1) The amount of time between regulation of the gates and <br />initial release demands (time lay. <br />2) The rate of these retease demands. <br />Together, these factors which are, functions of crop needs and <br />local climatic conditions, influence the amount of time the gates <br />are closed, and, how long upstream users can take the river. <br />Chart IV is a general summary of these events. Details are in <br />Appendix II. <br /> <br />....... <br />CJ1 <br />Ut <br />Q <br /> <br />Tillie lag between storage Initi~ltion and CODlnlcncement of <br />releases ranged from 0 hours to 21.7 days. For 25 events, out <br />of 35 analyzed, releases were begun within 24 hours. For 16 <br />of thcse. releases were begun immediately. The length of these <br />SUIIllller ~torage events ranged from one day to five and one <br />half months (the commencement of winter storage). During five <br />years: 1955,1957,1965,1969 & 1970, the reservoir contained water <br />when the winter storage period began. This is in addition to <br />the six years when the reservolr waS not drained at all (1949, <br />1950, 1951, 1958, 1966 and 1967). <br /> <br />^ comparison of the date of maximum storage to the time <br />that releases began (see Chart V) reveals that releases were <br />usually begun before the reservoir had stopped accumulating <br />water. Releases were begun after maximum content had been <br />reached only in 1964 and 1971. <br /> <br />Chart VI shows the general distribution of these average <br />releases for each event. Demands at maximum or near maximum <br />rates occured for approximately one-third of the events. <br />Releases at the ma.ximum permissable rate were constant for the <br />following events: September 22-26, 1963; May 29-June 17, 1964; <br />August 2-6, 1976, August 18-21, 1977; June S-19, 1978 (but <br />demands were not continuous from June 7-13); June 28-July 2, 1978; <br />and July 11-12, 1978. Appendix III contains three sample release <br />schedules, illustrating how these varied from day to day. <br /> <br />~ The mean of the event average~ was 722 efs with a standard <br />deviation of 253 cfs or 35%. However, the average daily release <br />demand was 741 cfs with a standard diviation 287 cfs or 39%. <br />The median is 820 cfs and the mode is 1000 cfs. Colorado's <br />demands alone averaged 469 cfs with a standard deviation of 144 <br />cfs or 31%. The median was 500 cfs and the mode was 600 cfs. <br />Kansas' daily demands averaged 370 cfs with a standard deviation of <br />57 cfs. There were 55 days (out of 199) that Colorado called <br />water and Kansas did not. These were deleted in computing Kansas' <br />average. .Both the median and the mode for Kansas are 400 cfs. <br /> <br />- <br /> <br />._-.--- ---- _I:""'.'.,~ <br />