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<br />, <br /> <br />'" <br /> <br />4;, <br />~ii <br /> <br />Proqram Limitations. <br /> <br />The fOllnwinq assumptions a~e Implieit in the analytical expressions used <br /> <br />in the Rl!IC-2 program and the st:)lit flow option: <br /> <br />1. Plow is st~a"y b~cause time dependent terms are not included. <br /> <br />2. Flow is graduallY yaried beeause a hy~rostatie pressure distribution is <br /> <br />assumed in the en..rgy equation. <br /> <br />3. Plow is one-dimensional because the total energy head is the s_ for <br /> <br />all pnints at a cross section location. <br /> <br />4. The river has a channel slope of no more than lO Percent. <br /> <br />5. The split flows can bf! estimated by the stan<"ard weir equation, the <br /> <br />norma! depth ~quation, or a ratinq curYe of outflow -vs- eleyation. <br /> <br />6. Suhm~rqence of thP oyerflow weir by tailwate~ is insiqnificant. <br /> <br />7. The 1Ieir flow is linearly inteqrat'" along the length of thl!! weir based <br /> <br />on the upstream an" downstream water surface or ~nerqy elevations. <br /> <br />8. '!'he normal ilepth eonY~yance is linearly inteq~ated alonq the length of <br /> <br />the norma~ deptll eross section hased on the upstream and downstre.. <br /> <br />water surface eleyations. <br /> <br />9. The direction of th~ main stream flow is at right angle to the split <br /> <br />flow. <br /> <br />lO. S-pl1t flow is controU..... by either the water surface elevation or thE" <br /> <br />energy eleyation. <br /> <br />11. Plow boundaries are fixed. This is to say that the c~08s ~ection an" <br /> <br />weir qeometries ,.", not erode or ehange with t.illle. <br /> <br />5 <br /> <br />, <br />