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タイトル: Characteristics of stemflow for tall stewartia (Stewartia monadelpha) growing on a hillslope
著者: Liang, Wei-Li
Kosugi, Ken’ichirou
Mizuyama, Takahisa
著者名の別形: 梁, 偉立
キーワード: Deciduous broad-leaved tree
Forested hillslope hydrology
Rainfall partitioning
patiotemporal variations
発行日: Nov-2009
出版者: Elsevier
誌名: Journal of Hydrology
巻: 378
号: 1-2
開始ページ: 168
終了ページ: 178
抄録: The characteristics of stemflow were observed in a tall stewartia (Stewartia monadelpha) deciduous forest on a hillslope in central Japan, revealing new findings for a previously unreported type of deciduous forest. Using 2-year observations of 250 rainfall events, we analyzed seasonal and spatial variations in stemflow for several trees, and applied additional data sets of throughfall and plant area index (PAI) to produce a rough estimate of seasonal variations in rainfall redistribution processes and canopy architecture for a single tree. Compared to previous findings for other deciduous tree species, the ratios of throughfall, stemflow, and interception to open-area rainfall obviously varied with PAI changes for tall stewartia. Meteorological conditions of rainfall amount, rainfall intensity, wind speed, and wind direction had little effect on stemflow generation, which was mainly affected by variation in canopy architecture. Three novel characteristics of stemflow were identified for several tall stewartia trees. First, the yearly stemflow ratio at the forest-stand level for tall stewartia (12%) was high compared to previous findings on beech and oak stands, indicating tall stewartia has considerably high potential to generate a great amount of stemflow. Second, stemflow tended to be 1.3-2.0 times greater in the leafed period than in the leafless period. Third, the amount of stemflow was 12-132 times greater on the downslope side of the stem than on the upslope side. It likely caused by the uneven area between the upslope and downslope sides of the canopy and by asymmetrical stemflow pathways between the upslope and downslope sides of the trunk due to downslope tilting of the tree trunk.
著作権等: c 2009 Elsevier B.V. All rights reserved.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/87312
DOI(出版社版): 10.1016/j.jhydrol.2009.09.027
出現コレクション:学術雑誌掲載論文等

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