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<br />. <br /> <br />. <br /> <br />. <br /> <br />00102S <br /> <br />Table 12.-~Reservoir surface losses <br /> <br />Item O<rl:. -Apr. J..'e.y June July l~ug. Sept. ,'",nual <br />Po.n evaporr.tion <br />in inches at <br />Eitche'.l Sxper- <br />imento..l Fe:.rm 17.26 5.99 6.29 8,02 7,08 5.12 50..36 <br />Reservoir e-."...-....lp- <br />or"tion in <br />inche s 16.22 5.63 8.48 7.54 6,65 4,81 47.34 <br />Reservoir e WI p- <br />orc,tion in fa et 1.35 0.47 0.54 0.63 0,56 0.40 3.95 <br />Procipi tc.tion <br />in feot 0.37 0.22 0.21 0.15 0.17 0.14 1.26 <br />Reservcir surface <br />lo"s in feet 0.98 0.25 0.33 0.48 0.39 0.26 2.69 <br /> <br />In Table 12 the evaporation given for Mitchol1 Experimental Farm <br />is too 35 yarer r.vero.ge obtllined with a Unitod 3to.tes Bureau of Plc'.nt <br />Industry pan. Pan evaporation is multipliod by 0. coeffioient of 0.94 <br />to seouro re servoir evn.poration. Average preoipitation at the IS. tchfJ 11 <br />Experimental Farm is given in feet for the 30 year period ending in <br />1944. Precipito.tion is hero oonsiderod oqual to past oonsumptive use <br />on tho rosorvoir o.reo., a.nd is ded'lctod fro~ reservoir 'wutor surface <br />evo.por~tion to secure tho increased loss from the resorvoir surf~ce <br />area estil;]c.ted to result from oonstruotion of tho roservoir. <br /> <br />SC8p::\~O <br /> <br />The Goology Roport on Braziol Reservoir indioatos that seopage <br />losses ;"Iould bo nogligib10 provided tho.t small "ref,S of exposed pam.- <br />cable bedrock aro blanketed end n out-off trenoh is oxtcnded through <br />tho \~lloy fill to unweathered bedrock. In any e,ont, modorato seep- <br />ago during tho irrigation season would be tributary to Dry Crcok from <br />;"!hich it YIould be di vcrted into tho Horse Creok Ln teral and not bo <br />lost, Consequently, soepugo losses '..,ero neglected in the resorvoir <br />operation study. <br /> <br />Siltation <br /> <br />Tho silt content of the vurious seuroes of reservoir inflow has <br />not boen r,co.surod. Undor prosont conditions 0.11 th,) potential <br />reservoir inflow, excopt that from rainfall runoff and Lnramie River <br />spring flood flows, is aInost silt froo. Tho North Plutte drops tho <br />bulk of its silt lor.d in tho Goornsoy Rosorvoir nnd, cxcopt at tilo.es <br />'.'Jhon silt. "lr: ooing rluflhl1rl fro!"":. ~HGrn6uy, t;l,n riv0r :ts q'}i.tC' clenr at <br />Who.1=. <br /> <br />31 <br />