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<br /> Table 9. Average percentages of instantaneous streamflow and instantaneous totai-recoverable iron load contributed to the <br /> Arkansas River by the upstream main-stem site and the intervening tributaries in the same reach. April 199o-March 1993 <br /> (Main.stem siles are in capilallc:ners] <br /> 0226 Streamflow Tatel-recoverable Iron load <br />, -. Site name (In percent) (In percent) <br /> (see Isbls 1) April June July- October April June July- October <br /> August August <br /> Main-stem reach I (Leadville to Malta) <br /> LEADVILLE 41 70 54 30 33 51 32 14 <br /> California Gulch 2 I 2 I 77 3.5 26 22 <br /> Lake Fork above Halfmoon Creek 39 21 36 35 41 37 48 43 <br /> Iowa Gulch 0 4 4 4 0 2 2 0 <br /> Empire Gulch 0 2 I 0 0 3 4 0 <br /> Main-stem reach 2 (Malta to Granite) <br /> MALTA 5.6 32 30 80 69 44 53 130 <br /> Lake Creek below Twin Lakes Reservoir 19 59 56 12 22 15 28 3 <br /> Main-stem reach 3 (Granite to Buena Vista) <br /> GRANITE 76 78 78 76 165 57 130 166 <br /> Clear Creek below Clear Creek Reservoir 9 12 15 10 3 3 14 7 <br /> Main-stem reach 4 (Buena Vista to Nathrop) <br /> BUENA VISTA 78 92 80 53 87 70 58 64 <br /> Cottonwood Creek 2 1 I 7 4 I I 9 <br /> Chalk Creek I 9 8 8 1 9 8 20 <br /> Main-stem reach 5 (Nalhrop to Wel1svil1e) <br /> NATHROP 99 99 96 77 117 94 106 50 <br /> South Fork Arkansas River 2 3 I 5 2 5 I 23 <br /> Main-litem reach 6 (WeU5vi1le 10 Pukdale) <br /> WELLSVILLE 83 88 95 87 75 821 47 54 <br /> Badger Creek 3 0 I 2 II 2 4 2 <br /> Tallahassee Creek 0 1 I I 0 I 2 0 <br /> Main-stem reach 7 (parkdal~ to Portland) <br /> PARKDALE II 98 122 104 74 88 125 32 <br /> Founnile Creek II 2 5 6 8 3 10 21 <br /> <br />Tuble 10. Results of Wilcoxon rank-sum lest (Hailed) of pr&treatment (April 199O--March 1992) and post-treatment <br />(April 1992-March 1993) instantaneous streamflow and iron concentrations at selected sites in ttle uppat "'tkansas Rivet Basin <br /> <br />(ftJ/s, cubic foot per second~ IlgIL. micrograms per liter; <.Iess than; S.less than or equal to] <br /> <br /> Streamflow Dissolved Iron TOlsl.recoversble Iron <br /> 5118 nsme Pre-/posl- Pre-/posl- Pre-/post- <br /> (see Isble 1) treatment p-vslue tr8ltment p-value treltment p-vslue <br /> median 1 median 1 medlln 1 <br /> (fl'/S) ("g/L) ("g/L) <br />Leadville Mine Draina.ge Tunnel 2.312.4 0.38 SSI3.S O. <0.01 ...2,100120 .. .. <0.0\ <br />California Gulch 1.811.8 .50 69140 .43 3.80013.950 .37 <br />Leadville 70/58 .50 88192 .29 3401240 .27 <br />Malta 991134 .35 92191 .44 4201440 .36 <br />Granite 2771470 .45 56147 .32 2351270 .35 <br />Buena Vista 4001462 .45 36141 .19 190/170 .48 <br />Nathrop 5631717 .45 34134 .36 3201230 .25 <br />Well,ville 5241742 .38 30138 .13 300/180 .37 <br />Parkdale 5821843 .41 . . 18123 ..,. .04 3501420 .38 <br />Portland 5121800 .18 21122 .48 70011,400 .08 <br />I Significant differences (~O.05) are shaded. <br /> WATER QUALITY 25 <br />