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<br />'f;ATEn StP.PLY C;:J.J'1AC?SrUSTICS
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<br />Tbe flo.... of ....ater in t~'H:~ screa'n3 "'f tr.e 1'8:;;10 v~rie5 con~in':.1'l.11y--
<br />fron: da:,' to dR.:;. r.:ontll to no~i:':-'. ar~ Yf:"~r t.o ::eer. '!'he h:drorra-:.r.s on
<br />Figure 5 illus-:..rr.te d::dly no'..:. z:,orlthly 'I',.rl3tior:.s i;", di~char::,e ''It ;-our
<br />t:agir.r stations in L. CO:::::!::O:1 .....ar; ~'i 'ure 6 ill'.!.:il,r!'",tes '"h<! fearly vari-
<br />ations r..t the 5~~e stat-ior.;,; for \/~',er \,e:i.rs 111i;-15~.
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<br />.last of tr.e basin's ....at~r suc!,ly ca::.es frae'. the ::;o'.mte.i!15. \there
<br />t"reciritH-ti:m is abundant and aCCU~5 It:.~."'el:{ during U~e \1:~..te:r in the
<br />for~ of snO\<'. ','ith ri~ing, te!!lpera.tu.:-es in the la.te 5?rir.,~' e!:c. early
<br />sw:-~~er. the s!'.o.... ml;>!t:; rapidly so the.t t~,e :;.treams rise- s~laroly. Then.
<br />as the st.oreJ S:1C1tJ is eX~I::J.u3t.ed. usuali:,.- t-.. 1,J.t.e J>;.1:-. t;',e r,erennial
<br />stre~ t::at flo.: tron t;;.;o :::Qunthim:; ::;u':..'",je t~. .: fair~_! ste<\c:: base
<br />no..... '..I"ich ~en(:ral.ly p~e'lails until t~.., ',ex: er.~t::!'.i' :;no'.l-l':',lI?lt c:,"c.le.
<br />Dur'::'r.g: the BtU",~er. pr~cirit. ,ticn in the -':o~'"1tainous :Jrt"!!::i Joes not con-
<br />tribute ~UCt; ....l't.ter to the streams; rat~er, !:lost c~. ::j~ rrecipitntion
<br />curl np; that season is C0r',sU~ec. b't ne.ti ve ve<;ct.I't ion.
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<br />I~ the interior cf t~e b~sin, exte~~ive nreu~ recei.e little ~re-
<br />dr-its.ti:m IJ.!'ld contrib....~. little '\.:f'.ter to ti:e streu..r=.s. .i.'iIUS, or. nbout
<br />11 ~ ~rcent of the badn. the aver:;..;,. :lea.:-l:: :~reci' itation is 1~5s than
<br />i i :c~,es, a.nd o~ 1.2 r,""rc~:-,t of the 'hasi:; it is le~5 t:-,tn 12 inches.
<br />Acco:-,ji~1,:ly. !;'!any of the tribut.ir:-' str~'L":l:j that drai.!1 '~\e ir.teriar a!"e
<br />i:-,te::'~:' :.~nt or f..'!'::eo.cral.
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<br />If cc~rehensive records of z'.!'eU!tflo',J ~.t.d b~en 01 t:1ino:,;l i!1 the
<br />basin l,efore ..he activities of ~'.:1 ',t:'.~n. ar.c si'\cc, t ::can_caused
<br />chenres in ::it rea:::. 1"cf:imen coulc. lie det.er::>ined acc-..:rate..... !i;:'..~ver. no
<br />r';cords ....ere start.ed until art'-'r ~~:'.'s use of '.later i:1 tole t,'3zin was far
<br />[:.-:vanced. l\lt!10~.h tne man-.::auzel.. cn:!n:-~s canr,Clt be ~~ter;.;inetl :J:-ecisely
<br />fro::c :<!.va.ilable detR. c~rtain cf th€-u C:l"l b,:, "'stinat,d ""i:.~iCl reas< ':ibIe
<br />lL:u~s 0:' 9.ccurtl.cy and ca.;: re disC'ril!:i d :'r0m natu:-al '1;,rOt~;'~<::;ltal
<br />effects. FrOCl."(!:lr~s le3di:: to such e::, it.ates are cutlir. r:er.t.
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<br />'tOi:-<"."". .t..I.ea:.;:'io.... i:i t:-:e i..4 \.:..lter yen:os e:'"; ;r.'Jterr:'~:.!" 30, 1951,
<br />....&5 taY.en 11" "f'r ~tft:'ldnrd r')r :over" ',niter Sl,;.!" t:11ri ":15 l..i4_/~ar
<br />reriod. ho....~'{.-.r. '..-ater '..15;' !l!:J ~t!. ,- df""clCT'.r-..'~t::; _:1c!"eas':u and i:1
<br />certuin st.~,'c'.-.s t ~e fla.... di!':',ini t: co::;.....p.nsunlt.'J.~.. l::'..k, to l~ave a
<br />CC!".J!:lOn bRae '".Jr cc!::':" ,:-~ .:~ r.t.rc........:!.O.;:3. .. ~ V'1~ :'.:;:-"..L-:1~d t:1.e.':. the develop-
<br />%:". 'nt.. ....or;..s ,:,:' !,..tr.,~ :.n 1';')1 had bee: C' ~ratic=n thrlj'.l.!:-~:tl1,.i.t. t'r,e 1~4_
<br />Jear tas~ y:-rioC.. ':'he.. .~ strea:::."':', '" ~ ~or~f ....e!'::: :,';.ju':>tec. L~ neces-
<br />sary to s..;.it th~ ~su:;' t.ic:.. {I~ 1 ...d'.es. \,'t:c~ ~rc- ~um~ari:ej in
<br />Fert :1 a! t~lis :"(';0:-...... ti.e 3ur~':'I.u of t; 'lu..c."~.~.:l BoG >~.,ts c.n l~-"~e.r
<br />standard ~~ioc. 1)~1-195:. tU~o. it. :.j'...: ~c a '. ,!,,'sel:t It"'vel'' of
<br />de....eloF!!:.e~t in .~.hic:. c,~'r-.....<!.i!1 rrn ects t\~e t.re ~''': p..: t:.oug~ ell their
<br />aut-hod:. .: feat.ures ....ere cc~.rl...t..e. ...he:-'~3.~ so: eo :.~ i', .;:plet.,;, 'In
<br />i:Ier:.eral. the :3i ffere,,':"'~ i.n .' o'J.:-'!.t.s 0:' 5t~U;c.s.r..: . ~ .', ".: flc.... F.,.f> Jeri ved
<br />b:.' the: Ju:-ee:.l of ~~cls:-atior: a;.d, by ,,;,-? Geolc,.:ical".l~'/~:; 'lre soall
<br />f.nd n!'e i:1cl":-'!."e-:"!uen' :d~ for th~ ,;urnoses of this r~?"',:-:,}
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