A forest-structure-based analysis of rain flow into soil in a dense deciduous Betula ermanii forest with understory dwarf bamboo |
| |
Authors: | Koichi Takahashi Shigeru Uemura Toshihiko Hara |
| |
Institution: | (1) Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan;(2) Field Science Center for Northern Biosphere, Hokkaido University, Nayoro 096-0071, Japan;(3) Present address: Department of Biology, Faculty of Science, Shinshu University, Asahi 3-1-1, Matsumoto 390-8621, Japan |
| |
Abstract: | The relationship between rain flow into the soil and forest structure was investigated in a dense deciduous Betula ermanii forest in northern Japan. The forest floor was covered with dwarf bamboo Sasa kurilensis. Observation was conducted from mid-July to late October in 1998. Leaf fall of Betula started in early September and ended in late October. Stemflow was proportional to rainfall and tree size diameter at breast
height (DBH)], and for the same rainfall, stemflow increased with leaf fall. On the contrary, throughfall decreased with leaf
fall. Throughfall was intercepted also by Sasa in proportion to its leaf area. Multiple linear regression analysis revealed that stemflow and throughfall of Betula and Sasa were predictable as functions of rainfall and forest structural characteristics, such as DBH, tree density, and stand leaf
mass. The rain interception by plants tended to decrease from summer to autumn, but the difference in the interception was
about 2% between July (fully expanded leaves) and late October (lack of leaves). About 96 and 87% of rainfall reached the
above- and below-Sasa layers, respectively. Thus, this study showed that understory Sasa is a major component of rain interception within the stand and that rain flow into the soil can be estimated by using rainfall
and the forest structural parameters, such as DBH, tree density and stand leaf mass. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|