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<br />g. The re1eases be10w "ELTSUR" using QMIIU, QMIN2, etc., are <br />determined during the spillw.y rating portion of the program and are <br />printed out as "assumed '1." for various e1evations in the tab1e pre- <br />ceding the routing. , The routing then is made using the Modified <br />Pul.s Method with a linear interpolation for the discharge between <br />various e1evations. If this interpolation is not satisfactory more <br />e1evations may be used to define the curve. <br /> <br />I <br /> <br />h. The flood routing by regu1ated gates is appropriate for all <br />gated spillW8.Y/l with or without induced surcharge. The induced sur- <br />charge enve10pe curve will normal1.Y be estimated by the camputer <br />using the va1ues of the curve shown on Exhibit 2 for the va1ues in <br />the tab1e8 "IPERDQ" and, "IPERSR". If a more detai1ed analysis requires <br />the use of another enve10pe curve, this curve can be read into the <br />canputer by changing the vaJ.ue in the input data for either or both <br />of the tab1e8 "IPERDQ" and "IPERSR". The standard vaJ.ues in the input <br />data must be replaced af'ter the specia.l run is made. The program will <br />route both the antecedent flood and the spillw.y design flood if desired. <br />The starting e1evation for the antecedent flood is usuaJ.ly at the bottan <br />of f100d poo1. The outf1ows are normal1.Y based on gate schedu1e curves <br />when the poo1 i8 rising. A minimum re1ease is used if the gate schedu1e <br />re1eaae is smaller than the minimum desired ("QJoIIlU"). When the poo1 <br />e1evation, of the antecedent flood peaks, the maximum gate opening is <br />maintained untH the pool drops to the top of flood contro1 poo1. <br />Be10w the top of f100d contro1 poo1 the outf1ow is based on the average <br />of the current inflow and the previous release with a minimum release <br />of "CHCAP". The spillw.y design flood is routed in the same manner liS <br />the antecedent flood except that the spillw.y design flood causes all <br />gate8 to be ful.1y opened requiring a storage indication routing from <br />that point unt11 the poo1 drops to "ELTSUR" when the gate regu1ation <br />routing routine takes over again. The criteria for determining the <br />re1ease for each period of the routing is- printed out on the computer <br />sheets in code form under the tit1e, "Case" (except for the storage <br />indication type routing). Tab1e 2 shows what each case represents. <br /> <br />5 <br /> <br />- <br />