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156 <br />CIIAPTER 3 <br />to storage. (The Jevelnpmen[ of such a curve a shown in Example Problem 4..). The <br />first in (omtation nerJcJ is a set of curves rclaung S ~ ° 0t, anJ S to slags. dt shoulJ <br />br taken as 10 to '_5 percent of the [iota to peak of the inflow hydro_raph. This is <br />illus[ralcd in Exantplr Problem 4.3. Si v2ral t2chnn)urs arc availJble to sokc equation <br />(3.10) and obtain the outflow hyJ rosaph. The RJ; slcfhoJ will br dlse ltsseJ. Thc• <br />reader is rcFcmJ to Overton anJ \12aJows (1976) for other methods. <br />Esanlple I'roblrm 4_? <br />A potential rex rvoir site has been surveyed anJ an area-elevation mlauonshq, <br />drla nnineJ y shown below. Tha outlet for th e pnncipal spIllWay IS to br lo2Jted at <br />Clt ea II OII 4OO Il`r t. CaICOIa IC IhC itag2-$IOrag C Cnn'C llp [O a^ rlCVallO^ O(JO6 td2l <br />assuming a dry resc rvoir when Ilow s[arti. <br />Elrvanon Area facn•s) <br />399 0 <br />400 I <br />401 3 <br />JO'_ ti <br />403 9 <br />40J I5 <br />J05 '0 <br />J06 'S <br />Sol a unn' <br />The mcremantal volume of slora^_c (or cash dIC1'J 11011 incrrnlrnt is 2alcula[2J <br />from Gd = Ir11 +A,1(z, -zlli-' ,vhrra AI anJ A• an• tha area; at el 2c.lnuro zl anJ <br />Z, Jild ~~ ~ IS LI12 COIIIIIIe nl slora _e bcnvrrn ili cJ [loos zl and z_. <br />EIC Ca 11011 Sure .-~rca Jt' 3l nraci <br />I2L`[ Icel aera$ ~ Ji r2~leai arreJ ril <br />399 0 0 0 0 <br />-100 0 I 0.5 0.5 <br />J01 I 3 ].0 '.5 <br />JO'_ v J.9 7.0 <br />-103 3 9 iS IJ.i <br />Jo3 4 15 I..o ,t;s <br />Jos s 'o I's JJ.o <br />Job v a ~J.o 03.0 <br />E.~:unpk Problem J 3 <br />Using a [isle inlcn'al o(S minutes anJ the SIJCe-AOraee rune ut L~:unpli Prob- <br />Iem J.', rJlrula a• the s[nra^_e-e harae0.•nslic cone for the reservoir ha.iJ ~In the <br />sLlcr-Jt>charer iurvr shown in Ficurr J.10. <br />$eluuml <br />A 2onversion Iron[ cfs W area-i t; hr is needed. I ef;= I aerc-in.!h r. Ihrn fore. <br />I rfs = Ill. acre-ft/hr. <br /> <br /> <br />HYDRAULICS OF STRUCTURES <br />zeo - <br />-_ P' <br />•Pll'/ <br />M ~•/ <br />a o.o.~ <br />zoo ~ <br />;I <br />sioo. 1m <br /> <br />Figure 4.10. Stagy Jischam2 cun•r for Example Problem 4,3. <br /> Storage Ducharee ~ S-$ 9t $+ <br />SWgc aC-II Cfs JC-tt/br aOf[ ao <br />0 0.5 0 0.00 0.50 0 <br />I 2.5 ~ 35 7.03 _..0 _. <br />_ 7.0 I'0 10.00 65S <br />3 13.5 137 I'._'S 13.99 I5.! <br />3 '6.5 I'0 1.1.17 '5.99 _. , <br />5 34.0 190 15.33 J3.3J JJ ;,I <br />6 63.0 .03 17.37 6~.'7 63 -. <br />The plot Of tha Jata is shown on Fi curr J.I I. <br />Puls Slcthal <br />Puls nt2thoJ 6 d semi-n unlrni al procedure mvolcine the use of eraph~ <br />tables. By rearranging equation (J.10), w2 obtain <br />S1+pa Ot=31-p1 tit+11 .1. 4t <br />This can he wlvcJ urine [he s[uragr charactcniui curves by the lollou mg Proir <br />(sec Fipurc J.I I): <br />(U For a gaven lime Interval. II anJ I. arc known. Also knowing <br />S 1 - °:' ~ t can br fuunJ (root the storage 2ha ~• ~ rrisuc cones. <br />