林(树)冠截留容量及其近似确定

目的]为了克服在林(树)冠截留降雨研究中采用"截留率"和"实测截留量"指标的缺陷。方法]提出了截留容量的概念及近似确定方法。利用两个林分的实测资料,进一步介绍了截留容量的近似确定方法并进行相互比较。结果]截留容量更能体现林冠对降雨截留作用的大小,它不仅能在不同林分或树种之间进行截留作用大小的比较,而且不受地域限制。结论]采用截留容量指标比较不同林分之间对降雨的截留作用不仅是有效的,也是合理的。

Interception Capacity and Its Approximate Determination of Forest(Trees) Canopy to Rainfall

Objective] To overcome defects on index of "interception rate" and "actual interception" in study of intercepting rainfall of forest canopy. Methods] The conception on interception capacity of forest canopy and approximate determination way were posed. Through the actual data, approximate determination way and mutual comparison of two stands were introduced further for interception capacity. Results] The conception of interception capacity can better reflect effect and degree of forest canopy intercepting rainfall. The comparison of interception impact between different stands (or tree kinds) not only was made by means of interception capacity, but also was not restricted by regions. Conclusion] The interception capacity is an effective and rational index on comparing the interception impact of rainfalls among different stands.