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<br />O".~~ <br />o iJ~) i <br /> <br />TABLE 7 <br />C11E\lIC\L SURFACE ".HER QU,\lITY BIG BLUE RIVER <br />pr" <br /> <br />- <br />51,\ T10~ pI! UARf)~'ESS AlKAlI!'\ITY ORTHOPIIOSPIL\lE ;\jITRA TE <br /> .~ C " C S " C <br /> . .~ . s . <br /> .s - - ~ .s ~ ] ~ E <br /> ~ ] .- .- '0 <br /> , , , , <br /> " " " . .- . " . <br /> - " " " " " <br /> ." :;:: , , , , , " ,. , <br />Crt'll' 6.8 7.8 8.3 45 175 205 45 215 335 0.1 1.45 3.1 0.6 1.1 2.1 <br />B.nnl.'stoll 6.7 8.0 8.7 15 175 ~b5 35 200 275 O.J 1.2 2.9 0.01 0.01 1.8 <br />Sour~e: -":cbf4,ka SlalcVepartmentof Ilcalth f131 <br /> <br />The Hioc.:hcmical Oxygt'n Ikm;wd (BOD) and Ihl.' Chemical Oxyg.1'1l Dt'llland ICOD) an,' <br />commonl}' used as measurements or pollution. The liOD analysis ml':J.SUTl'S the- ability of the <br />microor~anisms 10 break down organic m:lttt:r by biocht'mical oxidation ;.md the COD analysis <br />I1H.'asun:s tilt' ability of the availabk' dissolved oXY.!?l'1l in Ihe slream to break down the org.;mic <br />malll'r by chemical oxidation. T:lblt' 8 shows [he BOD :JIlU COD conCl'ntrati0JlS in tht' Big <br />UIlIC Riwr ~I Crt'le and B:nneston.IIJI Till' dissolved oxygen contl'nt found in the rivt:r. plus <br />thl' rl'o,ll'ration which OCl'urs from wall'r spilling. over the power dams, appca(>; to Iw ;tdcqu:J1l' <br />10 l'any out thl;' nl'ccssary oxidalion fl'aclions. <br /> <br /> "'tin. \lode \L..tx. ,\lin. <br />Crt'le 3.3 ..LS Ib.~ 4 <br />Banlt'ston 3.0 .1.3 14..7 H <br /> <br />TABLE H <br />BOD A1\U COD CO:\'CENTRATIO:\S <br />Big LUue Ri'"er <br />(m~/l' <br />Bon (on <br />\lodt' \Iax. <br />43 I"" <br />35 ISh <br /> <br />Another indkatur of watl'T quality is thl.' coliform bai;tl;'ria i;oUnl. Thl' \1. !'. 1\", Clllifoflll <br />analysis is a mt'asuremcnt of a g:roup uf organisms v.'hich induoc all aerobic and faellItJti,'e <br />anat'wbie nonsporl'l'Ofming. bacilli whkh ferment ]aeto~1;' with a gJS formation. rill;' <br />interprelation of thl' \1.P.i\. Coliform count is Jiflii;ult since many of tlw specics of h:Jctai:J <br />:.IfC common ,>oil org:.lnisnl'>. <br /> <br />Thl' nwasurell1l.'nt of fecal coliform has fl'cl.'ntly bt'cn pcrft'cteo so it c;m he done on ;t <br />rOulinl' tlasis :.Illd prm;d('s a mOft' ft'a]istic illdk;llion of pollution. :\ ft'i;t'llI study by t1w <br />.'\ebrasb Ikpartmcllt of Health indic;ltt's that. although m;ln~' municip:llitit's :.Ire conlributing :I <br />hC:l\'Y 10:10 of ft'l,:all'oliform. tht' river has lht' ability to dcstroy Ihl' m:Jiorit~ of tht'st' coliform <br />by 111(' rim\.' it rt'aches tht' statl;" linl'. <br /> <br />34 <br />