Estimation of intercepted rainfall in rolling hills

为了明确地形位置、林分种类和降雨特征对森林截留降水蒸发的影响，在3个样地进行了降雨截留观测。这些地块被山毛榉林和落叶松林覆盖，山毛榉林和落叶松林位于山坡上，落叶林位于东京秩父大学森林的谷底附近。3个样地暖季截留雨量基本相同，但投流和茎流比例不同。山毛榉林、混交林和落叶松林的茎流占露天降水的比例分别为12%、10%和2%。在三个plos中，冠层上附着水的最大容量估计为0.3mm。并结合马来西亚沙巴热带雨林的穿透雨和茎流资料，讨论了降雨强度和降雨间隔时间等降雨特征的影响。

In order to clarify the effects of topographic Iocation, species of stand and rainfall characteristics on evaporation of intercepted rainfall from forest, rainfall interception observation has beeb carried out at three plots. These plots were covered by beech stand and larch stand situated in rigde of hillslope and a mixed deciduous stand situated in near valley bottom in the Chichibu University Forest, University Forest in Tokyo. Intercepted rainfall amount of the three plots were nearly same value in warm season, while the ratio of throufall and stemflow were different among the three plots. The ratio of stemflow to open rainfall is 12%, 10% and 2% at beech stand, mixed deciduous stand and larch stand, respectively. The maximum capacity of attached water on the canopy was estimated to be 0.3mm in the three plos. The effect of rainfall characteristics such as rainfall intensity and duration between rainfall event were also discussed together with the throughfall and stemflow data obtained in tropical rainforest in Sabah, Malaysia.