Throughfall in an evergreen-dominated forest stand in northern Thailand: Comparison of mobile and stationary methods
Throughfall in an evergreen-dominated forest stand in northern Thailand: Comparison of mobile and stationary methods
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DOI：
10.1016/j.agrformet.2008.09.002
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发表时间：
2009-02
影响因子：
6.2
通讯作者：
A. Ziegler;T. Giambelluca;M. Nullet;R. Sutherland;Chatchai Tantasarin;John B. Vogler;J. Negishi
中科院分区：
文献类型：
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作者：
A. Ziegler;T. Giambelluca;M. Nullet;R. Sutherland;Chatchai Tantasarin;John B. Vogler;J. Negishi
在2002年季风雨季为期4个月的研究期间，泰国北部一片受干扰的常绿林分中，用固定和流动方法测定的穿透雨量占降雨量的82%(1134毫米)。两种方法的相关变异系数和标准误差分别为≤10%和2%。4个固定槽式采集器和20个移动标准量规采集器之间的协议是在35次采样后才达成的，这些采集器的总降雨深度为700 mm，其中包括一次风暴。一些冠层树通过将树干的树干径流引导到树干和大树枝上的公共滴水点，从而促成了穿透降雨。然而，穿透点测量值和相应的冠层覆盖度之间没有明显的相关性。尽管对穿透雨量的180点测量提供了500平方米林分内空间变异性的真实表现，但值得怀疑的是，它们复制了流域尺度的变异性，这将受到树隙和与地形相关的可变雨影效应的影响。
Throughfall determined by stationary and mobile methods in a disturbed evergreen-dominated forest stand in northern Thailand was 82% of rainfall (1134mm) during a 4-month study period in the monsoon rain season of 2002. Associated coefficients of variation and standard errors were ≤10% and 2%, respectively, for both methods. Agreement between four stationary trough collectors and 20 mobile standard gauge collectors was achieved only after 35 sampling occasions, having a total rainfall depth >700mm, and included one storm event >100mm. Several canopy trees contributed to points with throughfall>rainfall by channeling stemflow to common drip points on the trunk and large limbs. However, no significant correlation was observed between throughfall point measurements and corresponding canopy cover. Although 180-point measurements of throughfall provided a realistic representation of the spatial variability within the 500-m2forest stand, it is questionable that they duplicated the basin-scale variability, which would be affected both by tree gaps and variable topographically related rain shadow effects.