Differences in throughfall drop size distributions in the presence and absence of foliage
Differences in throughfall drop size distributions in the presence and absence of foliage
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DOI：
10.1080/02626667.2015.1052454
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发表时间：
2016-02-17
期刊：
影响因子：
--
通讯作者：
Levia, Delphis F.
中科院分区：
文献类型：
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作者：
Nanko, Kazuki;Hudson, Sean A.;Levia, Delphis F.
植物-土壤相互作用过程中，土壤雨滴谱分布是一个重要的研究内容。这是第一个已知的研究，以量化的存在和不存在的树叶穿透DSD的差异。采用滴径仪测量并计算了穿透雨滴的最大直径（D-MAX）、平均体积直径（D50 DR）和相对体积百分比（pD（R））。在鹅掌楸下面在马里兰州（USA），当冠层无叶时，D-MAX、D50 DR和pD（R）显著更大。事实上，根据增强回归树分析，有无树叶是影响所有三个穿透雨DSD的主要因素之一，沿着空气温度。实验结果归因于不同的物理性质之间的叶和无叶时期和差异的水分行为叶片和树皮的拦截水。今后的工作应审查集中滴点对穿透雨引起的热点发展的影响。[图片]
Throughfall drop size distributions (DSDs) are important for plant-soil interactions. This is the first known study to quantify differences in throughfall DSDs with the presence and absence of foliage. Employing a disdrometer, three parameters solely representing throughfall drip were measured and calculated: maximum drop diameter (D-MAX), median volume diameter of drops (D50DR) and relative volume percentage of drops (pD(R)). Beneath Liriodendron tulipifera L. in Maryland (USA), D-MAX, D50DR and pD(R) were substantially larger when the canopy was unfoliated. In fact, the presence or absence of foliage was one of the primary factors affecting all three throughfall DSDs along with air temperature, according to the boosted regression tree analysis. Experimental results were attributed to differing physical properties of intercepted water between foliated and unfoliated periods and differential water behavior on leaves and bark. Future work should examine the effects of concentrated drip points on the development of throughfall-induced hot spots.[GRAPHICS]