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林业科学 ›› 2008, Vol. 44 ›› Issue (2): 23-27.doi: 10.11707/j.1001-7488.20080204

• 论文 • 上一篇    下一篇

武夷山甜槠常绿阔叶林林分降水分量特征

任引 薛建辉   

  1. (南京林业大学森林资源与环境学院 南京210037)
  • 收稿日期:2007-09-19 修回日期:1900-01-01 出版日期:2008-02-25 发布日期:2008-02-25

Characteristics of Precipitation in Castanopsis eyrei BroadLeaved Evergreen Forest of Wuyi Mountain

Ren Yin,Xue Jianhui   

  1. (College of Forest Resources and Environment, Nanjing Forestry University Nanjing 210037)
  • Received:2007-09-19 Revised:1900-01-01 Online:2008-02-25 Published:2008-02-25

摘要:

2004年对武夷山甜槠林不同水文分量定位观测,探讨甜槠林森林水文与降水的关系。结果表明:1)2004年共发生降水219次,年降水量1 767.4 mm,穿透水、茎流量和林冠截留量分别为1 304.9、245.0和217.5 mm;穿透率、茎流率和截留率分别为73.8%、13.9%和12.3%;2)同次降水中,林内不同位置的穿透雨量差异显著,穿透水量与大气降水量之间存在明显的线性关系; 3)随着胸径的增加,茎流量减小,形成茎流的时间推迟; 4)当降水量<202.1 mm时,林冠截留量随着降水量的增加而增加;当降水量超过202.1 mm后,林冠截留量趋于定值52.5 mm。

关键词: 甜槠林, 降雨再分配, 穿透雨, 树干茎流, 林冠截留

Abstract:

Hydrological effects of Castanopsis eyrei forest in Wuyi Mountain were studied in 2004 The results indicated: 1)There were 219 precipitations in 2004 and the total precipitation during this period was 1 767.4 mm, throughfall, stemflow and interception was 1 304.9, 245.0 and 217.5 mm, respectively, and which accounted for 73.8%, 13.9% and 12.3% of precipitation, respectively; 2) The throughfalls at different places in the forest were different significantly for the same precipitation, furthermore the relationship between throughfall and total precipitation was linear; 3) With the DBH increasing, the stemflow decreased, and the time taking stemflow was postponed; 4) When precipitation was lower than 202.1 mm, the interception increased with precipitation increasing, when precipitation was higher than 202.1 mm, the interception inclined to 52.5 mm.

Key words: Castanopsis eyrei, rainfall redistribution, hydrological effect, throughfall, stemflow, canopy interception