Abstract
Succeeding to the author's previous report on the estimation method of the probable rainfall-intensity-formula based on the Logarithmic Normal distributions, another estimation method to which the Extreme Limiting Theory is applied is proposed in the first part of this paper. Moreover, an eatimation method by the “Specific Coefficient” is further proposed, which can be determined by rainfall charactristics of a short duration time in Japan, with considerations of the type of rainfall-intensity curves. For any types of the curves, and various formulas in the past can be reduced to merely one generalized form by this method, which gives the simpler estimation of the curve with higher accuracy than the former methods. It is also an advantage of this method that it can be applicable, even if the rainfall records cannot be obtained for each duration of rainfall over a long period as in the case of local cities.
