南京林业大学学报(自然科学版) ›› 2008, Vol. 32 ›› Issue (03): 9-13.doi: 10.3969/j.jssn.1000-2006.2008.03.003

• 研究论文 • 上一篇    下一篇

种亚高山森林群落林冠截留量及穿透雨量与降雨量的关系

薛建辉1,郝奇林2,吴永波1,刘兴良3   

  1. 1. 南京林业大学, 江苏省林业生态工程重点实验室, 江苏 南京 210037; 2. 扬州市野生动植物和湿地保护管理站, 江苏 扬州 225009; 3. 四川省林业科学研究院, 四川 成都 610008
  • 出版日期:2008-06-18 发布日期:2008-06-18

Relationship among canopy interception, throughfall and precipitation in three types of subalpine forest communities

XUE Jian-hui1, HAO Qi-lin2, WU Yong-bo1, LIU Xing-liang3   

  1. 1. Nanjing Forestry University, Jiangsu Key Laboratory of Forestry Ecological Engineering, Nanjiug 210037, China; 2. Yangzbou Wildlife and Wetland Conservation Station, Yangzhou 225009, China; 3. Sichuan Academy of Forestry, Chengdu 610008, China
  • Online:2008-06-18 Published:2008-06-18

摘要: <正>带锯条的受力很复杂,为确保锯解精度和效率,对带锯条结构系统的振动特性进行了研究。根据弦的振动理论,计算木工带锯条系统的固有频率pn,同时应用有限元法求该系统固有频率的近似解,并应用随机频谱法测定了带锯条固有频率的试验值,分析比较3个频率值的结果表明:试验值与理论解最大误差不超过10%,在低频阶段,试验值、理比值与近似值误差小于3%。

Abstract: In this paper, the dynamic changes of the canopy interception, throughfall and stemflow of three types of typical subalpine forest communities, i. e., Abies faxonian forest, Quercus aquifolioide forest and shrub-bamboo, forest was investigated. The quantitative relationship among the canopy interception, throughfall and the rainfall was analysed, too. The results indicated that the average canopy interception values were 278.2 ram, 362.1mim, 353.7mm, and their rates accounted for 35.77%, 46.55%, 45.47% of the total annual precipitation in Q. aqulfolioide forest, Shrub-bamboo forest and A. faxonian forest, respectively. The stemflow quantity and rate of A. faxonian forest were 5.9ram and 0.76%, respectively. The canopy throughfall of three types of forest communities accounted for 53.77%, 53.45% and 64. 23%, respectively. The regression models among the canopy interception, throughfall and the rainfall were established to evaluate the eco-hydrological effects of subalpine forests and the basis of natural forest conservation and management in this area.

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