Changes of Natural Rainfall Characteristics Through Pine Forest Canopy in Miyun Mountain Region

LUO De; YU Xin-xiao; DONG Lei

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Changes of Natural Rainfall Characteristics Through Pine Forest Canopy in Miyun Mountain Region

- Changes of Natural Rainfall Characteristics Through Pine Forest Canopy in Miyun Mountain Region
- Bulletin of Soiland Water Conservation Vol. 27, Issue 2, Pages: 67-70(2008)
- 作者机构：
  
  北京林业大学水土保持与荒漠化教育部重点实验室,北京,100083
- 作者简介：
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- Published：2008
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LUO De, YU Xin-xiao, DONG Lei. Changes of Natural Rainfall Characteristics Through Pine Forest Canopy in Miyun Mountain Region[J]. Bulletin of Soiland Water Conservation, 2008, 27(2): 67-70.
DOI：

LUO De, YU Xin-xiao, DONG Lei. Changes of Natural Rainfall Characteristics Through Pine Forest Canopy in Miyun Mountain Region[J]. Bulletin of Soiland Water Conservation, 2008, 27(2): 67-70. DOI：

摘要

采用先进的LNM激光雨滴谱探测仪

连续不间断观测北京密云水库周边山区2006年8月—2007年1月的降水过程;结合以往研究雨滴所采用的方法和成果

从降雨产生能量的机理入手

观测分析了北京密云水库周边人工林林内外降雨雨滴特性和降雨动能的变化。林外天然雨滴平均直径和雨滴中数直径都有随降雨强度的增加而增加的趋势;林外的雨滴直径较林内分布范围小

林外雨滴直径与累积雨量之间的关系曲线较林内平滑;小雨强(≤0.35mm/h)气象条件下

林内降雨动能显著高于林外降雨动能

可初步认为在小雨强时林冠层对降雨能量有增大作用。

Abstract

By using advanced laser LNM raindrop spectrum detector

precipitation in the mountain area around Miyun Reservoir of Beijing City

was continuously detected from August 2006 to January 2007.Combined with previous methods and research results on raindrop and started from the mechanism that rainfall generates energy

the changes of raindrop characteristics and rainfall energy outside and inside forest canopy in the area were analyzed.The result indicates that average diameter and the median diameter of natural raindrops outside forest canopy decrease with increased rainfall intensity.Raindrop size distribution outside forest canopy is commonly lower than that inside forest canopy.Curve for the relationship between raindrop diameter and cumulative precipitation outside forest canopy is smoother than that inside forest.At low rainfall intensity(≤0.35 mm/h)

rainfall energy inside forest canopy is significantly greater than that outside forest canopy.So

it may be agreed that forest canopy can increase the effect of rainfall energy at low rainfall intensity.

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