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<br />CiE!lCAL QUALI'r"i OF T:!:~ ".-:;"Ti:R
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<br />Variations in Cr.e~ic~l ~unlltv
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<br />In addition to the ve:-iatior.z ~ro~ place to .:lace, just s~~arized,
<br />the chem.ical q-..:alit, of ....<::.':.e::- ir. t:;,~ str~pr"'~ of t.!:e basin ct.ar.ges from
<br />d~:; to day !lnd !'ror'. month to ~o;.tr.. The concentra....ior. of Q.i5~olvl:d
<br />solids var~eS ~e~rly in inverse r~lation to vater disctar[e. being
<br />least during hiGh flo~s and greatest during 1~~ flo~s. The range in
<br />concentrntion bet~ee~ ~iGh Bnd low flo~5 is relatively s0811 i~ the
<br />hefid~ater areas cut is large in the dcynstre~ reaches of ~~y str~am$.
<br />Figures 9 and 10 sho~ tyrical relationships.
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<br />Variation in relation to stream~l~~
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<br />:ig'.l!"e 11 and To.~le;;; 7 to 10 sho..,; relati ,,~i.:. po; bet.,.rp~n ch.-r-.ical
<br />cO::lI1osi',ior:. of ....ster a-....:. st':-~'er.f'lc'J Cot fC''JI stat.;;. ,~..,; 0::' ::Inin strea=S of
<br />the Up;-er Colcr'l.do Ri','~;,' :,&.S~:~. /..::lor-g the fou:- Sf. ~LlO-:'~ the \Oater uy
<br />~e a c::.lr:iu::.-bic~rbana.te. calc:,....-:.-sulfa.te. or soditl:l-s';.lfate ty-rJe
<br />r.:.cCQ!":li:15 to the ,-,tr!:'8..::! ur.J to the ~Ur'.t. of no\.!. '~'.l:-ing high floys.
<br />tn~ .......ters of a~_l the st.:-ee.!:!!' cor-l!::o!11y a!"<:, of the cfl.lci~:-t>icarbcnate
<br />ty;E'. At ::cedi an and 10.... fIo....s. th'! Col:)rs.do Rive:- roe!::r Cisco. Utl;.'::.
<br />~d the ~ree~ River ~t Grce~ ~iv~r, Vtah. yield ~ s~1i~-sul~Rte ~3ter,
<br />a.n1 the S'.:1 Jt;3.n Ri....er Dear glu~:" Ut.a!>. yield::: a calcL~_sc>(~i\ll'i_su.lrate
<br />.r.:.ter. 7he Colorncto Ri~~r at L~es ~erry. Ariz., yi~lds calci~~-sul~at.e
<br />vete:' ~t r.c1i'ln flo....s ~::.(;. sodiu..~-st:l:'a.te ....Ilte:- a.t 10... :~lo""s. I..~ the
<br />:'Lo:ure B:1d 1n t:,e fou:- tar-Ie:::. a hir!l flo.... is c:' e mag.'l.itc~e e-:;.':<lled
<br />or exce",dea 1("' - -=rcent of thp- tiu:e, h ::ledi!!.!': ~lo'" is ,"--:.a~ ~;ua1f'd or
<br />exce-..:ded 50 percer;t of t~,e ti, ar.d. ale.... flc...... 1" ti:,;:. 1,ualed 0:'
<br />er.ceec.e>d 90 !"lp.rcer.t of t!:f ti~
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<br />.r-: t.he ht.'f1.c-:":lter B.~,": c~: tr.c Up""),..:- n:::..". t"e .anp'"e 1.'l. ilssolved-
<br />solids c~,,(~e:.tr3.til)r-: 1~ co~<;ic.erabl:v l~ss tt'\. r. t~e sn.::e S'~' a::.s '.lot
<br />~m"er al", i ....-1des. Vf.f::-'? c,'-~c:.ly th(' c.iH.:':r.els nre -..: .er-lair: rs ~e~imcn-
<br />L p,:-:; roc;,-.~ <tnd .....!":en: t~1f,' c:'i:::ate is ~c:-e 3.ric.. '!'ht:3, Fi;:>l"~ 12 sho....s
<br />the !'"ela-;..ion 01- C!leoi.:al .:c~pc,r;itior. 'U1d dissolved-solids :::o!.cent.r3.t.io:":
<br />to ....at~r aisc~arfo:l (\t feu!'" 'ty,;ice:l .i~nd\Ja.ter strea:r. stat.icr.:;. These
<br />streQI:l!l are O'~ c<1.lciu::-bicRrbor.R.':.e \'o.t,~r durir..,- r.i .~ ~lm"~ lI\t all four
<br />51.atio:1s, also -:":ri:".!~ flo....s of v.:.l r,'\:~:litudes at t....o of the f;')llr. ~he
<br />t....o discordo.nt :;t:-eE.I:.s--t..le iJnco~pahc!"~ ?iv!'r at Colo.'l.:3.~ Colo.. B.:1d
<br />t;.~ ;:",:0 Jua.n River n~::l.r :.11 H'lCO, .'1. t~~x.__\'! eld celc~ ~.-sulre.:..e '~'nt.er I\t
<br />the 10.... ~~lo...... The rrinc:-nl :-ea.~or; :'0:" tr~ ::::iffe!"e:oce in 10....-:-:0"
<br />c07'":,(":~i tio:,; appears tc "o.e the charac:,.r 0:' :ls J.r'~ rocks that un..ler-
<br />lie the resrecth'e cra:i!:;~~e 'iT..;,
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<br />'/a.riatic:: ~n reI tion to ,~eolof
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<br />~O:1. :rJ.qor er-....iro!"...:.~nt!l.l f.tctors th~t d.'''~r'~;l~.~ t:;<: che=ical
<br />1UE'.li+,y of t}; ~tre!:.:.l wllterS e.!'e the ki:,1~ 0:- rochf' ':. .,- 'l!lderlie the
<br />soO'vi::ra.1 drainec;e 'l..s.sins. 7hus. t\ t.ead....aters of ":-.~ .-,~,lo~"ldo, Grf."en,
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