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<br />0,1'77 <br /> <br />Water Quality <br /> <br />The quality of water for irrigation is judged in terms of its influence <br />on crops either directly or through changes in chemical and physical <br />properties of the soil. The major factors considered in evaluating <br />the suitability of water from the South Platte River for irrigation <br />are total dissolved solids, boron, and the relative proportion of <br />sodium to other cations. Studies show that water from the South <br /> <br />Platte River is of excellent quality with respect to boron and sodium, <br /> <br />even for sensitive crops. The total diS~~" ved solids concentration <br /> <br /> <br />historically diverted for irrigation, ~lch obtained from the <br /> <br />, ~ . <br />"Final Environmental Statement forl't~~ N~r\ows Unit," is shown in <br />r.. ' ,~ <br />table E-1. The salinity is claS~edm~d}tm to high. <br />/,', ;, <br /><.' ,;1' <br />Table E-l.--Total d;.fsolved'51~lids diverted to irrigated <br />landt/b~l~w:,},frows Dam site <br /> <br />/-"';'~:"'':..:l <br />" ~, <br />"Quan . ty <br />1, DOC!> ac- ft <br /> <br />28-Year mean <br />(1947-1974) <br /> <br />Quality <br />mg/l 1,000 tons <br /> <br /> .f. <br />Janua ry 0 1245 0 <br />February 0 1264 0 <br />March 0 1236 0 <br />April 16.2 1056 23.2 <br />May 42.7 908 52.7 <br />June 60.4 815 66.9 <br />July 75.8 968 99.7 <br />August 73.2 1183 117.7 <br />September 58.4 1212 96.2 <br />October 19.6 1257 33.5 <br />November 0 1252 0 <br />December 0 1269 0 <br />Annual diversion 346.3 1041 489.9 <br />ac- ft = acre-feet <br />mgll - milligram per 1 iter <br />