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<br />{}\)i)433 <br /> <br />DAY OF TRANSMOUNT AIN <br />RETURN-FLOW RELEASE <br /> <br />50 <br /> <br />Station 07105500 <br />Station 07105530 <br /> <br />I 0200 <br />..... <br />:0 <br />o <br />::;; 40 <br />OJ <br />j:: 0400 <br />::;; <br />o <br />a: <br />u. <br /> <br />~ 3+ <br />~ f <br />OJ <br /> <br />; 20l <br />ii: I <br /> <br />Station 07105800 <br /> <br />Station 07106000 <br /> <br />1000 <br /> <br />1800 <br /> <br />10 <br /> <br />NOTE: Gaging stations listed in table 1; <br />locations shown in figure 2. <br /> <br />o <br />2400 <br /> <br />1200 <br /> <br />"..;. <br />::" <br /> <br />l'.." <br /> <br />,.', <br /> <br />DAY OF TRANSMOUNTAIN <br />RETURN-FLOW USE OR REUSE <br /> <br />.....:: <br />.~ ": <br /> <br />(Station nor used in uriginal aCcounting program) <br /> <br />0200 <br /> <br />. -~. <br /> <br />0400 <br /> <br />..,' <br /> <br />1000 <br /> <br />Station 07106300 <br /> <br />1800 <br /> <br />J <br /> <br />Station 07106500 <br /> <br />2400 <br />TIME <br /> <br />~.' .. <br /> <br />1200 <br /> <br />2400 <br /> <br />Figure 3. Time periods used in computing provisional daily mean discharges at streamflow- <br />gaging stations on Fountain Creek for input to the transit-ioss accounting program. <br /> <br />a1!hough !he input data are needed on a near real-time <br />basis. !he transit-loss computations for a given release <br />day are not made on a real-time basis, and the compu- <br />tation day (the day after the "use or reuse day" in fig. <br />3) lags the release day by 2 or more days, (At some <br />times, such as during weekends or during periods of <br />highly variable discharge in Fountain Creek. !he water <br />commissioners may not operate !he accounting <br />program each consecutive day; thus, two or more <br />computations may be made at one time to bring !he <br />computations up to date.) <br />Dai ly mean discharges input to the accounting <br />program are provisional (subject to revision) because <br />(I) the 24-hour periods !hat are different from a <br /> <br />midnight (2400 hours) to midnight period at some <br />gaging stations (fig, 3) are never used in computing <br />published discharge data and (2) the discharges are <br />computed on a neaf real-time basis and may be <br />adjusted later with more up-to-date stage-discharge <br />shift data. The resulting elTor in transit-loss calcula- <br />tion was not considered to be substantial (Kuhn, 1988, <br />p. 88), The TRF and the native return-flow quantities <br />that are input to the program are for a nonnal 24-hour <br />period to facilitate administration of !he TRF use and <br />reuse program. Diversion data that are input also are <br />for a normal 24-hour period, primarily because the <br />quantity of streamfiow diverted remains fairly <br />constant from day to day, <br /> <br />'..J <br /> <br />.:... <br /> <br />.::..~ <br /> <br />DESCRIPTION OF THE ORIGINAL TRANSIT-LOSS ACCOUNTING PROGRAM 7 <br />