Design a circular storm sewer to be laid on a minimum slope to carry a peak discharge of 10 cfs. Consider that the
depth at the peak flow is 0.7 time the diameter of the sewer. The minimum flow to be maintained is 3 cfs and the velocity at minimum flow should be 2 ft/s. The Manning's roughness coefficient is 0.013.
manning formula =1/n R 2/3 x S 1/2 Q=A V R=D/4;hydraulic raduis for circular pipes... View the full answer