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<br />Annual Water Supply <br />Missouri River at SIoux City <br /> <br /> <br />'0 <br /> <br />" <br /> <br />to- .......... <br />'" <br />~ 30" ....... <br />'" <br />'" <br />U <br />" <br />~ <br />:J 20 <br />~ <br />:1 <br /> <br />u.o <br /> <br />..........___n.......n. .................. <br /> <br />'0 <br /> <br />uo <br /> <br />'0 <br /> <br />o <br /> <br />11100 <br /> <br />11110 <br /> <br />1820 <br /> <br />IIno <br /> <br />.. <br /> <br />'0 <br /> <br />. <br />. <br />, <br />:mm 20 <br />. <br />. <br />. <br />,...... <br />. <br />. <br />. <br />. <br />. <br />I -10 <br />I <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br /> <br />o <br /> <br />1840 <br /> <br />11160 <br /> <br />111110 <br /> <br />'lt10 <br /> <br />11180 <br /> <br />CALENDAR YEAR <br />Figure 2. Annual Water Supply Missouri River at Sioux City <br /> <br />if IhNt' an- pi'oplt' ~1t'n' who wfluld lik!, a COp,' 01 It, <br />Wt' would ht. ~larllO I:'l\'(' you on!:', 1l....1l 111).pagt' dill" <br />UJnt'nt ~(l \\1;' a,.k that il vou don', want onto liT fITt'n'! <br />g'lling '" t{'ad it don"t takt, il. hut II you would lik(' 0[1(' <br />10 study. _'<Ill art' w('koml' lOLL \\'f" han' a \t'tV limitt-tf <br />,.upp!y hNt'. linn if WI" don"! IHiH- ('noudl 'At' will take <br />....our namt' and "l:'nd Ion!;' III ~'llU Tht' stal6 IInd ft>dt>ral <br />a~t'n{'it';. will all I.... ;':t'l1 ing ('Ol"t',. In ttw muil ..hort Iv. <br /> <br />That dOl'Umt'nl onl~' t'xplain;. what'", happt'lwd thi", <br />pa..., Yl."IH and what WI' t'''flt-,t !O h:lfljlt-n in tht. [uttlrf'. <br />It i:-; R J;:t'lwral ddini!lllll 01 hn\\. \\.I'\t- opt'rRted Hlld <br />why Wf"\{' d"nl:" it. Thf' ha..ic rult'.. \\.1;' hun- art' ,lln. <br />lained in thl~ ma~tf'C lnimual. They fJutlllw how much <br />support \~f' art- to J:"i\"t' to fluod comrnl. 10 111l\'iglHion, <br />to hydnlt'll'{.tric power, and so on. Tht'rt- are difft'rt-nt <br />chapter;. in thl" hll()k that 11'1111" IH' ,.hou]t! do ct'rtain <br />thing,. at n'r1ain Ilme~, Tht'rt' i,. no way with It sy,.tem <br />It,. {'nmplf'x a~ this that you can "'rile a rule l)ll()k thaI <br />lelI,. you whal 10 dll each and f'~ {'r\ day. HUI it dot'''' <br />!ti\'e u,. 11'11' l:\Jidelim'" 10 fol\o\\.. <br /> <br />For examplt'. il would tt'\l U,. Ihltl If Clur "lOra~f' I" <br /> <br />2' <br /> <br />]t.,.... than,.o mueh on the Lith oj .\Iard... WI' will Kin' <br />It rf'r!ain amount 01 ",upJlort 10 na\"iJ:"lltion. If il\ so <br />mueh on tht- I"t of ,'uly. Wt' will g-in' so milch /I" a <br />.,;UppOr! 10 I1Il\"iJ;:/ttion. It It'll" u;. in the sumnwr hnw <br />much Wllll-r we should rt>leH"t- in Iht' wintN timp in <br />llrdt'r to "upplIrt h~'dr~ot'J~'('1 ric jlOWt'r. ~o Ihl'rt' I" 11 <br />relRllOn"hip tlt'lwt'f'n thl' :<t'J'\'in' to nlt\"iKlllion and Iht' <br />,.t'J'\'in- 10 Ilond eonlro] and thl;' "e"r\'i,t> III hydcot'It'{'lril" <br />pm\;t'r. <br /> <br />How do Wt' eomf' up wllh al] 01' tho,;e rulf''' Ihat art' <br />nmtaint.d in Ihlt! t)l)ok'~ Tht',.t, arf' ,..omt' of lht' thing~ <br />thai Dr. :-,ht't:'r "'a,. rt'Jt'ccinl' to thi~ morning. \\'e ha\"t> <br />a mlllhmatica] modi'] YE-AC" ago pt'oplt- u.-;.ed to do Ihi~ <br />by hand, bUI tht'Ct' I" Il modelth111 cumains the basiC' <br />rulf',; oj I hI' ..y"tt>m. \\'t' lI1pUI to thllt model for Iht' <br />jwriod Iwlrinnin~ in 19-i.,. monthl.... intlo",,, 10 Ihe proj- <br />t'ct,. a" well a.. dt'pll,tion,. dUt- 10 Icri~Ation and other <br />IninJ:";.. \\"t' !Ipt-tIlll" Ihi~ modt'1 to dett"Cmint' how it <br />re"p()nd_~ 10 thl" hi~toric pt>ciod of rt'Cocd. If WI' art> to <br />makt' a ehanp;' which ha.. IIt't'n SUIl,E:t'"led in ,.ome CAses <br />ht-ct'. WI;' would U,.f' 11'11" modf'1 10 dE-terminI' tht' im- <br />pact;.; of Ihfll chan~t'. If we wect' 10 reallocate ;.omt' of <br />