2000 Volume 44 Pages 25-30
Hydrological variables as a series of independent random variables is problematic because a phenomenon of rainfall itself is formed through certain physical processes and the hydrological variables are based on some of those processes.
This paper describes the introduction of a new hydrological parameter, the time variation concentration of rainfall, and shows the homogeneity, of the time concentration of rainfall against total precipitation over many hours. This paper also explains that conventional hydrological frequency analysis should be regarded as an analysis under the condition that does not need to consider the time concentration of rainfall, and finally discusses the method of frequency analysis using the new hydrological parameter with an example of analysis.
