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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。
Through the observation of the Picea crassifolia forest, a tree species group established in the Qilian Mountains, for six years, the precipitation characteristics and the redistribution of precipitation were analyzed. The results showed that the Picea crassifolia forest could increase the level of precipitation but had no significant effect on the vertical precipitation. The average canopy interception rate was 25.86%, the summer interception rate was 2.84% and the spring and spring seasons was 39.38%. Trunk cutoff accounts for 0.75% of the natural precipitation. When the precipitation exceeds 2.0 mm, trunk runoff begins to occur. When the primary rainfall reaches 26.0 mm, Generate trunk runoff.