【摘要】 为探讨长江三峡库区的森林水文作用,并为长江三峡库区的植被建设提供依据,对重庆四面山针叶林、常绿阔叶林和针阔混交林3种人工林的林冠截留作用进行了研究。结果表明:降雨量对林冠截留有很大影响,该地区林冠截留量与降雨量呈幂函数关系,3种人工林达到饱和截留量时的降雨量分别为55.4,52.2,102.4mm。穿透雨量与降雨量呈明显的一元线性关系,穿透雨量随降雨量的增加而增加。3种林分截留率的大小顺序依次为:针阔混交林>针叶林>常绿阔叶林,整个雨季的总截留率依次为:32.97%、27.36%、21.85%,平均截留率为:40.77%、31.86%、27.82%。通过分析比较,针阔混交林的林冠层次多,树冠容水量高,认为研究地区针阔混交林的林冠截留能力最好。更多还原

【Abstract】 In order to understand the water conservation function of forest and provide the groundings for vegetation construction of Three Gorge Reservoir Region of Yangtze River,the paper elaborates on the research of canopy interception effect between three artificial forests,namely,coniferous forest,broad-leaved evergreen forest,and broadleaf-conifer mixed forest in Simian Mountain of Chongqing.The results show that the rainfall amount influences the canopy interception greatly.The canopy interception correlates the rainfall amount with the relationship of the power function.The rainfall amounts of three artificial forests when they reach the saturated canopy interception are 55.4 mm,52.2 mm and 102.4 mm.The rain throughfall amount correlates the rainfall amount with the relationship of unitary linear.The rain throughfall amount increases with the rainfall amount.According to the interception ratios from high to low,the three types of forests are arranged as broadleaf-conifer mixed forest,coniferous forest and broad-leaved evergreen forest.Correspondingly,the general interception ratios of the rainy season for the three forests are 32.97%,27.36% and 21.85%,and the average interception ratios are 40.77%,31.86% and 27.82%.Building on the analysis and comparison,the broad leaf-conifer mixed forest has much canopy levels and high water capacity crown,so the canopy interception effect of regional mixed forest is the best.更多还原