(19C/29C) Seven {7} Hydraulic Programs

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An excerpt from Water Engineering & Management, Reference Handbook 85, volume 132, issue 8, 1985/07/31, pages 47 - 52, It Does Compute, Jonathan Waldo

" Programmable calculators seem to be able to do everything except tie your shoes, but to get the right answer out, you have to put the right program in. These programs present instantly useful ways to solve hydraulic problems - and certainly beat the slide rule.
  These hydraulic programs have been developed for the Hewlett-Packard [HP] 19C calculator, and may also be used with the HP 29C calculator. HP 29C users should replace PRX commands with R/S commands or PSE commands.
  The programs are summarized as follows:
  • Sewer pipe design finds D minimum, Q full, V full, given n, S, and design flow Q_d.
  • Pipe culvert analysis under outlet control finds head loss through system, H1, given n, length of pipe, 1, D, Ke, and Q. It also prints critical slope and intercept drop at critical slope.
  • Pipe culvert design under outlet control finds D minimum given n, 1, Ke, and Q_d, and H1 allowable and also prints critical slope.
  • Trapezoidal open channel design prints minimum bottom width required, given top width, sideslope ratio, z, S, n, and design flow Q_d. It also prints depth of flow, h, Q full and V full.
  • Triangular open channel design finds top width required to carry design flow Q_d, given sideslope ratio, z, S, N.
  •Pipe network analysis subroutine A calculates flows given head losses through pipes. Subroutine B calculates head adjustments for unbalanced flows at each junction.
  • Sewer pipe analysis subroutine 1 finds Q full, V full, given n, D, S. Subroutine 2 finds S minimum, given n, D, to carry flow Q. "

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