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<br />2-6 <br /> <br />4. Do as many as 99 alternates in a watershed, excluding <br />variations in rainfall amounts, rainfall starting times and duration <br />and anteced~nt moisture condition. <br /> <br />~, <br /> <br />5. Develop and route the runoff from as many as 9 different <br />rainfall distributions and 10 different storms for each rainfall <br />distribution. Runoff depths and durations will be developed and routed <br />for a rainfall distribution defined in either dimensionless units or <br />actual time units. <br /> <br />6. Combine hydrographs from an almost unlimited number of tributaries <br />and reaches (the limitation being the total number of standard control <br />operations). <br /> <br />7. Divide hydrographs into two separate hydrographs. <br /> <br />8. Read a discharge hydrograph and route it through a watershed. <br /> <br />9. Store up to seven computed hydrographs at anyone time. <br /> <br />eel <br /> <br />A further limitation of 600 Standard Control records will be described <br />in Section 3.6. There is also a limit of 24,000 peaks that can be <br />stored in Summary Table No.1. The number of peaks is equal to the <br />product of the number of storms times the number of alternates times <br />the sum of the number of, cross sections and the number of structures. <br />No. Peaks = (Storms x Alternates x (cross section + Structures)). The <br />only restriction to those items described as being unlimited is the <br />processing cost and' the practicability of dealing with too much output <br />data. <br /> <br />The program has been developed with strict adherence to a policy of . <br />having it: (1) as flexible as possible in the use of input data; (2) <br />provide for the maximum use of engineering judgment; (3) engineer <br />oriented rather than machine oriented; and (4) written in the FORTRAN <br />IV language to provide for ease in future extensions, alterations and <br />recompilation for other computer hardware. The input data sheets are <br />in a user oriented format with headings familiar to field engineers. <br />The program out~ut is arranged for ease in reading and is identified <br /> <br />~ <br />