【摘要】 通过对祁连山建群树种青海云杉林连续 6年观测 ,对其降水特性及其降水再分配进行分析。结果表明 :青海云杉林能增加水平降水 ,对垂直降水影响不显著 ,林冠截留率平均为2 5 .86 % ,夏季截留率为 2 4.84% ,冬春季较大 ,为 39.38%。树干截留量占自然降水量的0 .75 % ,当降水量超过 2 .0 mm时 ,才开始产生树干径流 ,当一次降水量达到 2 6 .0 mm时 ,云杉林不同径级的林木均产生树干径流。更多还原

【Abstract】 Through 6 years observation on Picea crassifolia stonds and analysis on precipatation features and its re distribution, it shows that: could add the horizontal precipatation and have a little influence on vertical precipatation. The average canopy interception rate canopy interception rafe in sunmer and in winter spring are 25.86%, 24.84% and 39.38% respectively. The amount of interception of tree trunk accounts for 0.75% of precipatation, and the precipatation amount over12.00 mm,then while 26.00 mm,precipatation one times cound make trank flow of all kinds of diamefer class.更多还原