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001025 . RESERVOIR OPEJU,T IONS Net Effcct Brrczicl Rc scrvoir would store m:cter "hich !oi,~ht othernise be w~sted on the Ft. Lrr~.ie Division of the North Pl~tte Project, By n~king 1~nd5 to be served by the reservoir ne~rly independent of furtLer relee.ses fron the Ft. L'.rm;de Ce.Ilnl during periods of "enk denr,nd, it ;'Iould he.ve the net effect of incrensing the effective crcp~city of tha Ft, 1o.ro,'.lie C~nCtl in thCtt wnter noW ce,rried for t~le l~nds under Br~ziel Reser:oir could be used on other lands in the Ftll LC\.r~.:r_1ie DivisionQ Reser'7oir Sl..l!'fn.cl3 Losses . The free \V~tf)r surfo.ce evuporc,tion of Br"ziel Reservoir wc.S Gstipmted ~ to~ be equf11 to tn.". t. d.t- the- St~te- ExperiJ:1entnl F"m, elevu- tion 4,080, 6 !Jiles eust of Mitchell end 20 niles eaot of Br"ziel Reservoir, The c.verage Experimente,l F"r!J evaporc.tion for ;.;1ril through Septer,ber W'eS obtc,ined fron the 1946 Nebr'.skll ClinCttologico.l D"tr: of the U. S. ;"oo.ther Buree.",; the October t!Jrough M,'rch evcporll- tion wUs estimated to be 25 percent Qf unnuo.l evupor"tion, by reference to studies of evnp0ration distribution trcnsnitted to ,,11 field offices by the Regionnl Offie.e under dc,te of Jlme 10, 1947, The roservoir surface loss in feet depth was calcule,ted as shOlm in Tnble 12. Reservoir surf~ce loss in "cro-feet nus conputed by o.pply- ing surfo.ue loss in foet of depth to the o.reu curve fl.S obtllined fron the o.rec._cc.pc,ci ty curve o.nd the con tan"\; shown for the nonth in Table 13. The Clrea-cupncity curve wus adjust8d to :".llon for 750 c.cre-feet of sedir.lent expected to o.CClll;tub.to durir.g the first 50 yec.rs of oporc.tion. It is recor;nized the.t c.t ti:!18s nhen the res8rvoir is not full there ,.;ould be Cl denuded o.reo. betueen tho \"later surfe'.ce '.nd tho no.ximU",\ water surfo.ce elevation. There would be losses to bnnk stor~r;a ut tipes when the water surface rises, und not ~ll of these 10ss~e would be regllined as yie Id fron bunk storo.ge when t.he we.ter sClrfc.ce dealinGs bec::,.usc of e'"T['.2or~:tion fror.1 tbD wot, denuded rlren. However, in the p~st there has been n loss by consun}tive use Gf vegeta~ion in t.his fringe C.reC, and it is estii:'!C.ted in these studies the.t such past loss to cunsunptive use is cquivalent to the futuro loss which 'l,ilould result; from eva.por~,tion in t~1a denuded fringe .':\rer",s. . so