（This is post presentation .Could you correct it for me ? Thank you vary much )
We used the intensive thinning treatment to management the devastated forest plantation in japan .This is our study sites.Two continuous sites and two new sites.My study site is Tochigi site in here .Our group observation the throughfall, surface runoff,stemflow and so on during the periods of pre- and post-thinning treatments ,and I main study about the influence of intensive thinning on water and sediment discharge in watershed scale and hillslope scale The result of my study is the intensive thinning can increase the water discharge and decrease sediment discharge in watershed scale.The intensive thinning generally reduces canopy interception and stemflow . We found the evapotranspiration reduced also.And our group calculate that 50%~60% thinning is the best proportion for treatment the devastated forest plantation.