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<br />lllJ14lj~
<br />
<br />With tht- {>xN'ption 01 tht' mouth of tht' ~Ii,.>;ouri
<br />River, the d,w.n"tream control point;;. of thost' areas
<br />.....ere located iH gaging "ration.. tIT feSl?r....O!T outt1o.....
<br />points having flo..... rt'{'l)rd.~ during part or all of Iht-
<br />,,{-Iened ;~5-~'ear ,..tud~' period 19-14 through 19';',c" At
<br />some location". thE' natural .....ater supply in tht' :\1i;.-
<br />souri Rina ba"in l1a.. bft-n ehangt.-d hy imp(,rb. I:'X'
<br />ports or transhasin diversions, The dlstribution of
<br />no....." ha;. alsu 1)f'E'n modifi.('(l hy ,..torag"t' in man.mad{.
<br />lakt-". \\"alt-r right" and legally n-quirt-d illstr(-am
<br />.....alN under ("ourt d"I"ree or compact al!'<o han. an im.
<br />pan on water ,I\ailabilit~.. Following is a brief sum.
<br />mary uf the lTIt'thod'l]Ogy u;.t'd 10 quantlf~' these
<br />faclor;;.,
<br />
<br />Historical monthly t1ow;; for the Hydrology Study
<br />"Nt' dt>tetmim'd at ~l:l lo('ations, Tht' ffit'an annual
<br />now al tlw ll101<t dnwll1<trt>am ,..tream ga~w In t'lleh of
<br />tht' eig-ht 1<ubhaSlns is li.~ted In Tah]t' ~. Tbt'1<t> now,..
<br />art> unadjll1<tl'd for dl'p]{,tions exC('pl for the cumula-
<br />tin' areas down,..trf'arn that han. Iwt"1I affe('ff'd by
<br />l'hange1< in upstrt'am imports lIr f'xport1< during the
<br />.'itudy pt'riod_
<br />
<br />Table 2
<br />Mean Annual Unadjusted Historic Streamflow,
<br />1944-1978
<br />
<br />SubbaSIn
<br />
<br />Mean Flow
<br />(cIs)
<br />10.900
<br />12,900
<br />25.600
<br />30.100
<br />7460
<br />52.300
<br />'200
<br />79,000
<br />
<br />Uppef MlSSO\.lfl
<br />YelIowstooe
<br />'WestefnOakotas
<br />'EaSlern DakOla!;
<br />"Platte-NIObrara
<br />-M~Mlssourl
<br />Kansas
<br />'Lower M,ssoun
<br />
<br />.fbw"'__"""""'_~ _ """'......"-"...-.
<br />"FlooI~_.....P\o~"'-a'ld~__....FWe>
<br />
<br />Import" inlO the ~!i....'iourl R1\t'r ha.'illl are madt-
<br />from tht' :-\1. :\Iary',.. River In :\1ontana. the Colorado
<br />Hi\'t'r hasin III \\"Y(lmill~ and Colorado. <lnd frllm Ihe
<br />Eagle River, a trihutary of the Culurado Hiwr. thrlluJ!h
<br />the Home.'iwke Tunnel t\l the :\rkan"i-lS RI\-er find
<br />th('n pump..<i to tht' headwaters 01 tht' :-'outh Pbttt'
<br />Hin.r in Colorado. Tht' J!enerallot"~HJ()fl of th6e im-
<br />port" is 1<hown on the "ubha_~in map,... C;raph" showing
<br />the amount 01 watf'r importt'd each year during the
<br />study period are also Included In t ht' subbasin "PCI inlls.
<br />Thp Ima] amount of water Importpd into lhf' :\li,.souTl
<br />Riwr Ha"ln in 197.... was in exct'Ss of :",110.000 ll(-rp-ft"t"l.
<br />Export:< of surfu('(' water from {ht' :\Iiss,)uri Ri\'t'T
<br />hasin llr(' made at two location,.;. The first is in :\10n-
<br />lana. where \~att'r tHken Irom thE' HI~ Hole Ri\'t'r is
<br />di\'Pr!ed \(I Hultf'_ :\I,)ntana. Thl:' ,,('cond i,.. nPM
<br />:'prin~field. :\!I,..SllUTl. whert' watt'r I" taken from Ihl:'
<br />
<br />Little Sac Rinr. BOfh pxrmrts art' for municipal water
<br />supplies. Total exporl;: ill 197.~ were in excess of 30,00n
<br />acre-lt>t't
<br />
<br />..\ IOta] of 1:\ node ha,..in tran,.fer.'i wer(' con:>iderf'd
<br />si~nifi('allt in tl:"rffiS ofthl' impact ('aeh has on the local
<br />surface watt'r supplit's, Tran.~ff'r" ace made for hydro-
<br />power. irrigation \~atN supply. and Hood control.
<br />C~raph,.. shnwinl; tht' annual amount of water diverted
<br />at t'ach location during the ;;tudy Jwriod art' located
<br />In tht' ,..uhhasin "eCllon,.. of Ihi,. report. Thf'!'t' transfers
<br />do not no,..,. ,..uhlHbin houndaries: tht>refore. Ihey do
<br />not aITe{.t lOtH] watt'r supply availability in each of the
<br />t"i~ht subha,..in".
<br />
<br />Ref!UlatlOn oj' surlill't" waIN supply by stura~e re;;-
<br />l.r\'OH.~ on'ur,.. at numf'ruus ]onltions throughout the
<br />:\li,..SOlHI Rl\er ba"in. For this study, sig-nificant reg-.
<br />ul<1lion WiI.'i a,.."ullled to occur whell the normal ca-
<br />pacity of 11 sturagt' rf'servoir \\a" :.WO,OOO acre-ft'et or
<br />mnrt'_ At tht' end of 1!.l7~. there wert' 2R reservoirs in
<br />the :\li"..lluri I{inr Basin in that eatf'~ury. Heservoir
<br />orwnuion program,.. were den']oped to rt'f!U]ate re-
<br />It'a,..l'"~ lor ~-I of Ih\.,.:.l' (l.,..ernlir:-l. Rathbun Dam in
<br />luwa. Ht'iJg-{'n D,11lt in :\10ntana, Big Bend Dam in
<br />:'"mh Dakota and he.\'ho]l:' [Jam in Wyoming- were
<br />l'xdudt'd Ilt't-allSl:' tht'ir llpt"Tlltioll had little impact on
<br />the o\-erall watt'r Il\"ailahi]ity within the ~lH;souri
<br />HI\'t'r Bibin.
<br />
<br />Tlw greatbt 11l1P<l(.t major rt>"eT\.oirs have on the
<br />wafN supply IS a len'ling effect of natural streamflow.
<br />Howe\'er. th('_\ a]..o dep]f'te the water "upp]~' throug-h
<br />net e\'aporatipn from Iht'lakt' surfact'.ln thp :\1is;;ouri
<br />Hl\t'r IJa,.;io, aVt"T:lgt. annual ('vapuration totn]" :2.6 mil-
<br />]ion ilt'rt'-[t't.t per yl',lT for thi" ~4 major rt':<eT\'oirs in-
<br />dudf'd HI thi" ...tlld~. C;rl1ph_" "howing- thp i"\'aporation
<br />df'p]f'tilln fnr earh rf-H'T\'oir un an a\'t'ragt' monthly
<br />bas.j" art' prt'''t'nted in later ~lIhba...in st'ctions of this
<br />rt'purl.
<br />
<br />Tht, e\1title!llt'\11 or right" to ,.urfa('e water in the
<br />\1t1<""lIri Ri\'er Basin \'Rry lrom state to "late dut' to
<br />difft,rt'Ill't'.'i III political philo;;llphit'" and law;; that con.
<br />tro] allo('atLUn_ Water right data and application proc-
<br />t'",.. Inform:Hlon haw. ht.t'n "ummarized Into narratives
<br />lor each 11Cldt' tM"in_ That informal IOn i;; locatt'd in
<br />the Walt'r A{-('(1ull1ing :,\._~tt'm datahasp and i;; avail-
<br />ahlf' thwugh that sy"'tem_ Brif'f dis('us."ions of e8ch
<br />"t.:lI('s' water rig-ht" pTlI<'es'" i~ pre"f'I1Ii"d in the sub-
<br />ba"ln ,..('l"llOflS of thl" rt'port.
<br />
<br />The idell!ifi(,llt i'11l of irrigated lands in thl' :\Il,;"ouri
<br />Hi\t'r Ba"in, the agricultura] watN u"t' related to the
<br />irrlgatit1n (If! ho"'e lands and t hi" streamnnw depletions.
<br />resulting from irrig<lli'lIl Wl're major activitie.~ of Ihl'
<br />\lHH H~"drol(lg-y ~lud~". Es.timmt''' of ;;treaml1ow de-
<br />p]etions a,.. a rbult 01 applicatIOn of con;;ern\lion
<br />measurt'.... farm pond" and accretIOn" to strt'amflow
<br />re"ult inl; from fOrl'~t mllnagt.l1lent pranit"es. were also
<br />P\"aIUaled.
<br />
<br />For thl" rt--port. data collected during !he stud~" were
<br />gruupt"d mtl) th(' elgh! "uhbasins "ithin the :\1i.'isouri
<br />
<br />:1
<br />
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