<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
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