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林业科学 ›› 2005, Vol. 41 ›› Issue (1): 194-197.doi: 10.11707/j.1001-7488.20050132

• 研究简报 • 上一篇    下一篇

北京密云水库库区水源涵养林冠层水文特征研究

刘世海1 余新晓2   

  1. 1.北京交通大学,北京100044;2.北京林业大学,北京100083
  • 收稿日期:2002-12-13 修回日期:1900-01-01 出版日期:2005-01-25 发布日期:2005-01-25

Hydrological Properties of the Canopy of Water Resource Protection Stands in the Miyun Reservoir Watershed, Beijing

Liu Shihai1,Yu Xinxiao2   

  1. 1.Beijing Jiaotong University Beijing100044 2.Beijing Forestry University Beijing100083
  • Received:2002-12-13 Revised:1900-01-01 Online:2005-01-25 Published:2005-01-25

关键词: 水源涵养林, 林冠层, 水文特征

Abstract:

Miyun Reservoir provides more than 70% drinking water resources for Beijing, it is very important that to study the hydrological properties of canopy of water resources protection forests, which to help managing and cultivating the water resources protection forests. In this paper, the stands of Robinia pseudoacacia, Pinus tabulaeformis and Castanea mollissima were studied from 1999 to 2000. The total precipitation amount was 545 mm in the 2 main rain periods from 1999 to 2000, distribution in canopy interception, through-fall and stem-flow in the R.pseudoacacia stand were 97.73 mm, 434.78 mm and 12.49 mm, respectively, that in the P.tabuleaeformis were 131.54 mm, 397.98 mm and 15.48 mm, respectively, and in the C.mollissima stand were 110.73 mm, 422.07 mm and 12.20 mm, respectively. The canopy interception and stem-flow amount of P.tabulaeformis stand, the through-fall amount of R.pseudoacacia stand was the biggest among the three stand respectively. The elements content of N, P, K, Na, Ca, Mg, Fe, Zn, Cu and Mn were monitored for the precipitation, canopy interception, through-fall and stem-flow of the three forest types. The total amount of weighed average content of ten chemical elements in precipitation was 12.001 1 mg·L-1. The sequence of the chemical elements weighted average content of the precipitation is followed: Ca > N > K > Mg > Na > P > Fe > Zn > Cu > Mn. The concentration of chemical elements of through-fall and stem-flow varied in differently for three forest types in comparison with the precipitation's.

Key words: water resources protection forest, forestry canopy, hydrological properties