Abstract
This study aims to understand hydrological variation of discharge, soil loss and recession coefficient in three small forested catchments using the longterm hydro-data from 1983 to 1992. The study catchments include the natural matured deciduous, artificial planted coniferous and erosion-control worked mixed forest. The amount of discharge and soil loss varied with the rainfall and forest type. Especially it was concerned on the variation of the recession coefficient closely related to storage capacity in three forested watersheds to clarify the effects of forest development on water resource augmentation. In erosion-control worked mixed forest, the recession coefficients for interflow and groundwater have gradually reduced since erosion control work finished. This can be interpreted to result from the increment of the storage capacity caused by improvement of the soil physical properties in catchment after erosion control work. In artificial planted coniferous forest, the recession coefficients related to surface runoff and interflow slowly decreased as the forest grew. However all recession coefficients in natural matured deciduous forest did not show any evident trends because of not change of the forest stand structure.
Published Version
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