Estimation of intercepted rainfall in rolling hills

为了弄清地形位置、林分树种和降雨特征对森林截留降雨蒸发的影响，在三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分位于山坡上，而落叶混交林则位于东京大学森林的七七部大学森林的谷底附近。在暖季，三个样地的截留雨量基本相同，但径流与树干径流的比值不同。山毛榉林、落叶松混交林和落叶松林的树干径流与雨量之比分别为12%、10%和2%。三个PLOS的冠层最大附水容量估计为0.3 mm。结合马来西亚沙巴州热带雨林的穿透雨和树干径流资料，讨论了降雨强度和降雨间隔时间等降雨特征对降雨的影响。

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.