Relationship between annual rainfall and interception ratio for forests across Japan
Relationship between annual rainfall and interception ratio for forests across Japan
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DOI：
10.1016/j.foreco.2008.06.036
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发表时间：
2008-08
影响因子：
3.7
通讯作者：
H. Komatsu;Yoshinori Shinohara;T. Kume;K. Otsuki
中科院分区：
文献类型：
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作者：
H. Komatsu;Yoshinori Shinohara;T. Kume;K. Otsuki
日本以前的几项研究通过比较不同地点的年降雨量拦截比（年降雨量拦截除以年降雨量），在不考虑地点之间气象条件变化的情况下，审查了由森林性质差异引起的降雨量拦截量差异。降雨拦截实际上取决于气象条件和森林性质。本研究使用假定相同森林特性（即冠层存储量、冠层闭合、叶面积指数（LAI）和感热传输体积系数）的降雨拦截模型，考察了日本各地与年降雨量变化相关的年拦截比变化，年降雨量是与拦截比相关的主要因素。日本的这一比率在0.12至0.24之间，与年降雨量高度相关。这表明，考虑年降雨量的变化对于评估由森林性质引起的降雨量拦截量的差异至关重要。我们重新考虑了日本以前的研究结果，比较了不同森林性质的立地之间的年截获比：(i)阔叶林和针叶林的截获量没有明显差异，（ii）针叶林的茎密度和截获量呈正相关。当考虑到不同地点之间年降雨量的差异时，这些结果仍然成立。
Several previous studies in Japan have examined differences in rainfall interception amounts induced by differences in forest properties by comparing the annual rainfall interception ratios (annual rainfall interception divided by annual rainfall) from various sites without considering variations in meteorological conditions between sites. Rainfall interception actually depends on meteorological conditions as well as forest properties. This study examined variations in the annual interception ratio relating to the variation in annual rainfall, which would be the primary factor relating to the interception ratio, across Japan with the use of a rainfall interception model assuming the same forest properties (i.e., the canopy storage capacity, canopy closure, leaf area index (LAI), and the bulk coefficient for sensible heat transfer). The ratio ranged between 0.12 and 0.24 across Japan and was highly correlated to annual rainfall. This indicates that considering the variation in annual rainfall is critical for assessing the difference in rainfall interception amounts induced by forest properties. We reconsidered the results of previous studies in Japan that compared annual interception ratios between sites with different forest properties: (i) there is no clear difference in interception amounts between broadleaf and coniferous forests and (ii) there is a positive correlation in stem density and interception amounts for coniferous forests. These results still held when considering differences in annual rainfall between sites.