2023 Volume 79 Issue 27 Article ID: 23-27019
Precipitation data are available at various spatial and temporal resolutions, it is not clarify to how differences of various precipitation data affect the results of hydrological and hydraulic simulations such as runoff analysis. In this study, we performed a fundamental study to contribute to the spatial evaluation of precipitation observation using JMA Radar-AMeDAS analyzed data in the Onga River basin.
As a result, it was shown that different areal rainfall data characteristics are tend to occur by increaseing reduction rate of the precipitation data. Relative frequency distribution of the areal rainfall with over 40% reduction of precipitation data was shown that polarize for the areal rainfall with no reduction at all.