STUDIES ON THE RATIONAL METHOD AND “DETENTIONS OF FLOW-OUTS”

Abstract

In this paper, contained some discussions of run-off coefficient, mean value of the Frühling's rain-curve, collecting time of storm sewage & etc.
18 kinds of most popular standard storm-intensity curves are sellected out for the practical convenience on sewage planning in Japan.
Main Subject of this paper is a new calculation method of storm run-off using “Detention coefficient”, that is most reliable because of the peaks of run-off must be lowered by detention flows in long sewers for its excess spaces.