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《Research of Soil and Water Conservation》 2011-04
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Rainfall Characteristics under Canopy of Plantation Forest in the Southern Loess Plateau

WU Guang-yan,CHENG Jing,ZHU Zhen-hua,WU Fa-qi,YU Xiao-ling(College of Resources and Environment,Northwest A&F University,Yangling,Shaanxi 712100,China)  
Rainfall characteristic under canopy is an important mechanism for forest hydrological,and it is an important aspect in soil and water conservation.In this study,Robinia pseudoacacia,Eucalyptus exserta Linn and Acer truncatum Bunge are selected as objects of study,and the rainfall is observed by filter-color stain method.Two hundred raindrops were obtained under each canopy of plantation.The rainfall characteristics were analyzed inside and outside the canopy,and the conclusions are as follows:there is a significant difference between inside and outside the canopy of rainfall.The raindrop distribution showed a normal distribution under the canopy,and it had more large raindrops;the relationship is not obvious between the median raindrop and rainfall intensity,and when the rainfall intensity is less than 0.1 mm/min,the median raindrop inside the canopy is less than outside the canopy,when the rainfall intensity is more than 0.1 mm/min,the result is just the opposite.The kinetic energy of rainfall had the same discipline with the median raindrop.
【Fund】: 国家自然科学基金资助项目(40871133);; 国家重点基础研究发展“973”计划(2007CB407201)
【CateGory Index】: S715
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