Development of the hourly hydrological model for mountainous basins using the storage function method and the Diskin-Nazimov infiltration model

This study aims to improve the daily hydrological model to an hourly hydrological model by combining the storage function method, the Diskin-Nazimov infiltration model and the groundwater recharge and runoff calculation procedure. The hourly hydrological model in this study was evaluated by estimating the runoff in the Sameura Dam basin (472 km), located in the mountains of Shikoku in western Japan, using 16 years series of hydrological rainfall data. The results indicated satisfactory to good model performance in terms of obtaining an accurate monthly mean hydrograph as well as daily and hourly mean hydrographs.