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<br />- -...... <br />O:jJ.l ~\) <br /> <br />SURFACE WATER QUALITY <br /> <br />The quality of the surface waters in th~ Big Blut.' River Basin vanes greatly during tht' <br />year. Studil'S conducted by the Nebraska State Dcparlmcnt of Health imJicate that the best <br />quality of watl'r cxbts in the late winter and early spring before the spring runoff occurs. The <br />Big Blue River may rank as tht." most polluted interstate river in Nebraska if \\Ie consider silt as <br />a pollutant. The U. S. Geological Survey conducted measurements of the suspended sediment <br />in the Big Hlue River near Crele during wakr-year ]lJ6~ (eetober I, )96] to September 30, <br />)Wi~.l Figun: 9 shows the monthly variation in suspended sediment that passl..'d the (rl'le <br />gaging station. The mean discharge for the year was 383 cubic feet per ~cond. The maximum <br />discharge of 5,430 c.f.s. occurred in March and Ihe effect of this can be observed in the Iota] <br />suspendl'd sediment discharge for ~farch. In addition 10 Ihe high load of suspended solids. the <br />Big B1ut' River recl'jves municipal and industria] wastl'S fralll every community locakJ along <br />the river.1131 <br /> <br />. <br />MONTHLY SUSPENDED SEDIMENT LOAD <br /> <br /> I I BIG BLUE RIVER AT eRn <br /> I (OCT 1961- SEPT (952) <br /> ($ed,menlln Tonsl <br /> '" IOO.oooT <br /> , <br /> \ 10000T <br />" <br />I \ I I <br />\ I <br /> lOOOl. <br /> , , <br /> , <br />, , <br />I I <br /> I I <br /> 1,00T <br /> <br />E <br /> <br />OCT ...av ore J....... F[8 "''''Il AP<l ......y ~..u..y "'UG S[PT <br /> <br />FIG 9 <br /> <br />3:! <br />