两种不同林分截留能力的比较研究

Rainfall interception capacity of forest canopy between two different stands.

根据林冠对大气降雨截留的实测资料 ,采取同雨量下取最大值的方法近似确定了两种不同林分的截留能力与雨量的关系并进行了比较 .结果表明 ,林冠枝叶空间分布均匀的人工林分 ,截留能力随雨量增加较快 ,不仅对 <30mm的中小雨量表现出了较强的截留作用 ,而且容易满足林冠的饱和截留容量 .尽管天然林对 <30mm的雨量截留能力相对较弱 ,但对超过 30mm的降雨其截留能力大于人工林 .林冠饱和截留容量与冠层枝叶量有关 ,天然林大于人工林 .

Based on the observation data,the rainfall interception capacity of the canopy in plantation and natural forest stands and its relation to rainfall were examined using the method of taking maximum under the same rainfall. The results showed that the rainfall interception capacity of plantation forest increased rapidly with the increase of rainfall,because of its even distribution of branches and leaves,which was higher under low rainfall less than 30mm, and the saturation interception capacity was easily reached,depending on the quantity of branches and leaves in the canopy. Although the interception capacity of natural forest was relatively weak under low rainfall less than 30mm,compared with plantation forest, it was much stronger under heavy rainfall more than 30mm. The saturation interception of natural forest was larger than that of plantation forest.