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<br />. <br /> <br />-.- -OOu!UZ <br /> <br />88 <br /> <br />Surface water <br /> <br />As discussed in the foregoing section1 "Ground 'Vuter", the key wells <br />Ilsed in the computation of normal f>vapotl'nllspinltioll of ground wuter <br />were so located that their records would not reHl'ct local fhH,;tuution~ <br />of the water table resultirw from vllrious types of surfucc flows. The <br />surface flows ore dissipnted by ndditiollul nonheneficial consumptin' <br />llse and by c\'upomtion from free water surface find ndjoining areas of <br />saturated soil in the urclls where residual surfllce flows become ponded. <br />Under theJ>lun of development, sueh surface flows would be cuptnred <br />und carrie in surface ditches to the main conVeYance chtlllnel find <br />would not f('chnrge the ground wuter resen'oil'. Th(~ minimum umount <br />of surftlCe wntcr which could be snlvngcd wns cunsidered to be cquinl- <br />lent to the identifiable surface fluw::; plus nl'onser\'lltively small aHow- <br />unce for eyapomtion from freC' water surface lllld Ildjoining arcas of <br />saturated soil in ureus wlH're fesidunl surfllce flows become ponded. <br />The yurious types of surface' inflow ilnd the amounts of such inflow <br />Ilvailable for salvage nrc discussed ill the following puragmphs. <br />Flood!louN, rench the S!tlnlge HreH us slIrfuce flows during periods <br />when tile flows of the streams discharging into the Clused Busin <br />nre greater than lIormnl. Since the stream channels generally become <br />indefinite before reaching the salnlge areu, the origin anti \'olume of <br />the flood flows ure indeterminate. Bee!H1se of the errutie occurrCllt'C <br />of flood flows reaching the sllh'age urea, this type of flow is not a <br />constant source of sulvnge!lble wllter, nnd 110 estimnte WtlS Illude of the <br />total nmollnt of floodwater thllt might be stlkuged directly fiS surfne(' <br />flow. A eonservati\.ek small llllowlIllee for slIlvugc of floodflow is <br />mlIde in a subsequent" section wherein the reduction ill enIporutioll <br />from free wnter surfnce and saturated soils in the areas of pondin~ is <br />estimnted, <br />Overflow from Russell Lakes \\"n:-; consillered to be u source of water <br />supply for the proposed ~Iishnk Lukes Kutional "~ildlife Refu~e und <br />not avnilnble for S!dnlge. <br />Drain flow from irrigatttl areas wus mellsHred during cnlend!lr :venrs <br />1949 through 1952 in two large druins that terminute in the sHlva~e <br />urea. There Hre other umneas\lre(l slIlull druins nnd ditche:-; thut currv <br />water out of the main irrignted nreu. This water is Pllrtially l'OnSUme(! <br />by irrigation nlld other consmnptive llse:-; before reaching the sulvuge <br />lIren. The measured flows of the two lurge drains provide II eonsernl.- <br />tively :-::'1l111Jl estimutc of the surface outflow from the irrigll.ted urell <br />which \\"oulll bi' ll.nlilnble for sah'll.ge. The llIlllllll.l disehllrges (If flU' <br />drains for the periods 1936 through 1945 and 1953 throuJ!h 1960 were <br />estimnted by correlation with the Il.tllllwl dive~ions hy l11il.jor cllnuls <br />which nre principal SOlUTes of supply for the Il.rens sen-ed by the drnins. <br />The recorded ulld estimated tlllTIlU1I volumes of drain "'nter n\"llilable <br />for snlnlge are shown ill table 6. <br />