The time series analysis of the rain outflow process of forest basin and the grassland basin in the Niigata University practice forest

The purpose of this study is evaluation of pubic function of forests, especially, the water-source conservation of forest basin and the grassland basin located in the Okura River source department drifting to Sado practice forest attached to the Niigata University Department of Agriculture. As a result of analysis, it was suggested that a comparatively short outflow of passage time contributes to the outflow of the grassland basin, and long outflow of passage time contributed to the outflow of the forest basin. This result shows that the mountain stream water of forest basin and the grassland basin flows out into the mountain stream each after a different outflow process.