【摘要】 文章以内蒙古东部地区油松人工林带为研究对象，采用１９８９～１９９３年系统观测资料，对穿透降水、树干径流和林冠截留动态变化规律及其在不同时段内的分配比例进行了系统研究。结果表明，穿透降水、树干径流和林冠截留的年度分配比例分别为６２．８％、４．９％和３２．３％；其月份分配为，降水量大的月份，穿透降水、树干径流与林冠截留量相对较大，截留率较小；降水量小的月份则相反。林冠对降水的截留、滞流等方面的水文功能对减少坡地径流、减轻土壤侵蚀等具有重要作用。更多还原

【Abstract】 ? The rainfall observations were made in Pinus tabulaeformis plantation in eastern region of Inner Mongolia During 1989 to 1993. The regulation of dynamic change in throu-ghfall, stemflow and canopy interception, and as well as the distribution proportions in varied time phases were systematically analyzed with the observed data. Results showed that annual distribution proportions of the throughfall, stemflow and interception quantities are 62.8%, 4.9% and 32.3% respectively. To the month with large quantities of precipita-tion, the quantities of throughfall, stemflow and interception quantities are relatively large, but the interception rate is low. To the month with small quantities of precipitation, that is contrary. Canopy plays an important role in reducing slope surface runoff and soil erosion for its hydrological function in interception and retarding-flow.更多还原