Throughfall partitioning by trees
Throughfall partitioning by trees
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DOI：
10.1002/hyp.13432
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发表时间：
2019-06-15
影响因子：
3.2
通讯作者：
Yamada, Kozo
中科院分区：
文献类型：
--
作者：
Levia, Delphis F.;Nanko, Kazuki;Yamada, Kozo
虽然我们知道降雨截留（从地上植被表面和地面凋落物中捕获、储存和蒸发的雨水）受降雨和穿透雨滴大小的影响，但直到现在还不知道针叶树和阔叶树下每种穿透雨类型（自由穿透雨、飞溅穿透雨、冠层滴水）的相对比例。基于一个超过1.2亿个穿透雨滴的跨国数据集，我们发现，穿透雨滴的类型、数量和体积在针叶树和阔叶树物种、叶片状态和降雨事件中的时间之间是不同的。与阔叶树相比，针叶树有较低的冠层滴水的百分比（51%比69%，相对于总穿透雨体积）和较小的直径飞溅穿透雨和冠层滴水。无叶阔叶树的冠层滴液比有叶阔叶树（D-50_DR为4.32 mm）的冠层滴液更少，直径更小（D-50_DR，冠层滴液的第50累积滴体积百分位数为2.24 mm）。冠层滴水直径在木本滴点（D-50_DR为5.92 mm）比阔叶树大得多。基于穿透雨体积，针叶树、有叶阔叶树、无叶阔叶树和木质表面滴点之间的冠层滴水百分比差异显著（p范围为
Although we know that rainfall interception (the rain caught, stored, and evaporated from aboveground vegetative surfaces and ground litter) is affected by rain and throughfall drop size, what was unknown until now is the relative proportion of each throughfall type (free throughfall, splash throughfall, canopy drip) beneath coniferous and broadleaved trees. Based on a multinational data set of >120 million throughfall drops, we found that the type, number, and volume of throughfall drops are different between coniferous and broadleaved tree species, leaf states, and timing within rain events. Compared with leafed broadleaved trees, conifers had a lower percentage of canopy drip (51% vs. 69% with respect to total throughfall volume) and slightly smaller diameter splash throughfall and canopy drip. Canopy drip from leafless broadleaved trees consisted of fewer and smaller diameter drops (D-50_DR, 50th cumulative drop volume percentile for canopy drip, of 2.24 mm) than leafed broadleaved trees (D-50_DR of 4.32 mm). Canopy drip was much larger in diameter under woody drip points (D-50_DR of 5.92 mm) than leafed broadleaved trees. Based on throughfall volume, the percentage of canopy drip was significantly different between conifers, leafed broadleaved trees, leafless broadleaved trees, and woody surface drip points (p ranged from