Parameters for relating unit hydrographs to watershed characteristics

It is suggested that the physical characteristics of a watershed exert two simultaneous and distinct influences upon the resultant unit hydrograph: one, whereby the runoff is brought to the valley; the other, in getting the runoff through the mouth. An empirical equation based on this thesis results in two parameters which are readily expressible in terms of the peak discharge and the time of peak. Between these two sets of parameters, the functional relationship is sufficiently complex to rob the latter set of any direct tie‐in with the watershed characteristics. Herein lies a possible explanation of the general failure encountered in correlating watershed characteristics with peak discharge and time of peak. It is hoped that the proposed parameters may be more successful in bringing about this much sought‐after correlation.