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<br />~A~ d1.tl'1~t1Oa .. ~, ~ flow <br />It. i. ~ titt1eu1t to ..t1ate the t1Id.nc at wbicl1 <br />return flow occur in the au... 1ben are QOt. wquate 1"1ItCC:mIa <br />available to detem.1ue 1M h1ator.lcal 8)Q~ pattern of X'e't.u:m <br />now. It 18 ~1'" that ~ 18 .. aezota1n bue flow .1ch <br />1s tair17 unUoN tl1ro\aPO"'i the 1"J.-.r. Howvel' 1 there ie a dlrect. <br />ettect trca cU.'NJ!l81ou appMr1na u an lureaae above tne bu. <br />return now. In otbe.l'......, a porUOIl ot iiU. 41..,.,.1011 votild <br />~ ~n _)e as re\UI'D tlO'lf' U'1n& the s_ DlOtith an4 to1.\ow1Q1 <br />.:mth or ..th8. loUovlraa 18 the critenatol" 41atnbuUon of <br />the total ftturn 11w ..'tMlllhe4 t_ the p;reaeo.t .~utiea. <br />1. ~~t~ tl_....~aZlH the .".rase total <br />retuft flow halt beea ..U.tect. u )8 pel"Ceot. 01 the <br />d1veftltm.a1Vi'th a tull at.. .~, the bue .N'turn <br /> <br />n_ tv a 7fI&I" of :NU 8U;PP17 18 ca1.eu1ate4 .. 19 <br />, <br />pe:ruat of the pnrlou.a yean 41....1011 41.a'tJl1buted <br /> <br />unltol'l&ll' ~t tM ~ J'eu'. <br /> <br />2. At.t41tlOM1retUft tJ.ow f:aa cur:rent diver- <br />............... .... . . , ' . - 1 -. ,....... <br /> <br />.1~.......In ad4:lUoa to tM bue J'etum flow eAUUonal <br />rettmUI trOll CU1"1"e1t 41 ft1"81ou 'Wben eqU&1. to crop <br />requ1nMDta 1s take. .. 19 l~~t of the diversions. <br />'lb. &dd1 tiODal :retU1"ll now appe<<rJ.raa 1n ftl'J:I morsth 1. <br />bu.. on the pft'Y1oua iIOAth' ft d:1 venlone . A44i t.lona.\ <br />nl'tu.m now 1n Mq voul4 be ).9 percent of AprU' a <br /> <br />d1ve.rsloo, add1ttonal return tlmr 1n June would be <br /> <br />~7) <br />