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106/06/06 14:00 臺灣大學森林環境暨資源學系梁偉立副教授 演講
演講公告
張貼人：網站管理員 ╱ 公告日期：2017-05-31演 講 公 告
主講人：梁偉立 副教授
地點：中央大學科學一館S-325教室
摘要：
講題：Processes of rainfall, infiltration, and landslide in forests
主講人：梁偉立 副教授
臺灣大學森林環境暨資源學系
時間：06月06日（星期二）下午2點
地點：中央大學科學一館S-325教室
摘要：
In rainfall redistribution processes in forest stands, a part of rainfall is intercepted by the canopy, while other parts are partitioned into throughfall and stemflow through the canopy as diffuse and point inputs to the forest floor, respectively. Therefore, the rainwater reaching the forest floor is considerably heterogeneous. Additionally, very rapid water movement and generation of saturated zones were frequently observed underneath trees, which could be attributed these features to small-scale water inputs by stemflow. Soil water dynamics and perched water distributions at the soil–bedrock interface are important information for the predictions of the location and timing of shallow landslides. Although there are many numerical models that simulated hydrological processes from rainfall through runoff and then conducted slope stability analysis to predict the location and timing of shallow landslides, heterogeneous characteristics within rainfall redistribution and rainwater infiltration processes were little considered. Thus, the mechanism and processes of rainfall-induced landslides are still intense interests of hydrologists.
In the presentation, I will introduce (1) how rainwater goes into soil layers, (2) how subsurface saturation generates at the soil–bedrock interface, and (3) how subsurface saturation relates to rainfall-induced landslides.
最後修改時間：2017-05-31 AM 9:00
