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<br />! <br /> <br />... <br /> <br />Computation Procedure. <br /> <br /> <br />The cnRpUtation procedure used to solve the prohlem of split flows is <br /> <br /> <br />hftsieally a one dimensional steady state method of trial and error, as follows: <br /> <br />. <br /> <br />1. The prOQraJII COIlIDUtes the water surface profile and adjusts the <br />discharges to reflect tile assUllet'! nverflows. No overflows are assllme<' <br />to occur for the first iteration unless the user has speeifi~ overflow <br />yalu..s on JS cards. <br /> <br /> <br />SPLIT FLOW REACH <br /> <br />c' <br /> <br />FIGURE 1 <br /> <br />2. The location of eaeh split flow reach (Figure l) is defin'" in relation <br /> <br /> <br />to the model by the upstream and downstream eross section numbers. <br /> <br /> <br />Based on the eross secion numbers, the water surface or energy <br /> <br /> <br />elevations are determin~ from the water surface profile Derf~ in <br /> <br /> <br />steD one an~ are us~ to calculate the overflow. <br /> <br /> <br />3. The COIIIl'Utf'd an'" asslllled ovp.rflC'WS for eaeh soHt flow reach and their <br /> <br /> <br />cumulative values are compared. If tile difference hetween any of the <br /> <br />yalues for ~t.d and 88SlIIIed is greater than 2 pereent, the p...oqram <br /> <br /> <br />ukes a new asslllllPtion of overflOl's and repeats steps 1 tbrouq'l 3 until <br /> <br /> <br />an accePtable tolerance is met or until ttu. program has perfo~ 20 <br /> <br /> <br />it"rations. <br /> <br />c' <br /> <br />4 <br /> <br />, <br />