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<br />. 1 0' <br />lJ.J I...J <br /> <br />lor anaIYM~, From this an.:llysh. the mean annual <br />hislOrkal runoff in inches was computed (ur the basin to <br />give the patlern shown on figure 10. <br /> <br />.-\ L1es.:flplion 01 the !louds Ihal na\'C occurred in the <br />basin would be too voluminous III indude here Such <br />de~riptions Jrc induded in annual flood reporls pre. <br /> <br />FIGURE 10 <br />MEAN ANNUAL RUNOFF (Inches) <br /> <br /> <br />~, <br /> <br />, <br /> <br />COL.ORADO <br /> <br />pared by the Corps of Engllleers. In U. S. Ge\J]u~w':31 <br />Survey Water Supply PJpers. ;ll1d in other reports by the <br />Stales and Federal age-ndes. In order 10 establish slOrJge <br />volume rCo..julrell1ents fur llood control purpoSi's :llld for <br />selection of design !loud!. Ill! in-stream C\lntrol. high <br />!low volume duration frequency data were de\'clopcd. <br />HiSlOrh': streamllow rc\'ords sho.... that the J\-efag:e <br />annual oUlflow of the 'lissouri Ri\"er rt'corded at <br />Hermann. \10.. near Ihe mouth. was 50.710.000 aae. <br />feel for lhe pt"riod Hi'l8.1966. In ils Iht"n.largely- <br />unregubted stale. annual eXlremes m streJmlluw <br />ft'corded at Ilermann ranged as high as 105 million <br />Jcre.feel in Illl5 to JS low as ~~ million acre-feel In <br />1934. f!<lWe\"er. streamllow records rd1e':l cOllStanliy <br /> <br />~ <br /> <br />~ <br /> <br />~ORTH <br /> <br /><"~I' ..- <br />....."""" ..-.~. <br />DAKOTA <br />\ <br />.~ <br />~ <br />'-! <br /> <br />1 <br />. <br />I <br /> <br />, <br /> <br />.., <br /> <br />- <br /> <br />-"...... <br /> <br />....~ .. M.." <br /> <br />1oI1SSESOTA <br /> <br />-' <br /> <br /> <br />. <br /> <br />, <br /> <br />~ <br /> <br />. <br /> <br />t(ASSAS <br /> <br />~_.._.--l~,",~"'-- <br /> <br />.:hanging le\'els of water resource development and <br />streamllow depletiun. and must b... adjusted 10 J curr...n! <br />level ot water re>OUH-e development, water uses. and <br />slreamtlow depletion. Accordingly. ;l\"ailable streamt10w <br />dala for lhe bJsill hJW been adjusted to Ihe le\'el of <br />water resource de\"elopmellt thaI is Jnticlpaled by 1970. <br />This mcludes the estimaled uses and watt't d...pletions <br />assodated with Ihe exisllng dt'velopmenls. and for Ihose <br />waler resource proje.::1S now undt'r construction_ On this <br />basis. 11 IS eSlimaled Ihal l;urrent Jwrage annuJI water <br />depletions would redu.::e the average annual basin <br />historical ouu10",," at Hermann tll 53.6 million acre-feel. <br />For plJnnmg purposes. 110 slream-measuring loca- <br />tions were selecled throughout the basin and the <br /> <br />17 <br />