北京南部沙地风蚀物理特征 Physical principle of wind erosion on sandy land surface in southe

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北京南部沙地风蚀物理特征

Physical principle of wind erosion on sandy land surface in southern Beijing

The endangerment of aeolian sand is one of the most serious eco-environmental problems facing the southern suburb of Beijing. To control wind erosion is thus a matter of great urgency. This paper chooses typical land-use types, i.e., cultivated land, wild grassland, drifting sandy land, etc. based on the fixed experimental observation and quantitative analysis, to conduct studies on the principles and characteristics of aeolian activities and measures controlling wind erosion in Daxing District of Beijing. The results show that: the near ground wind velocity yielded the logarithmic distribution with height; there are significant differences among different ground cover roughness; there are significant differences in the corresponding friction velocities caused by different properties of the underlying surface; there are differences in the threshold wind velocities speed in different land use types; and there are minus exponential relations between the sediment discharge percentage and the height at a range of 0-20 cm air flow layer. Different land use types result in various degrees of coarse component. There is a significant exponential relation between sediment transport concentration and wind velocity.

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作 者: 岳德鹏 刘永兵 王计平 LI Hailong CUI Weijia YUE Depeng LIU Yongbing WANG Jiping LI Hailong CUI Weijia  
作者单位:岳德鹏,王计平,YUE Depeng,WANG Jiping(北京林业大学)
:|c,H1GCj'fpk#P0刘永兵,LIU Yongbing(北京师范大学)水利论文HeW"X)g0Y)QS
LI Hailong,LI Hailong(The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China)
"T e1^V5Rl@(b0CUI Weijia,CUI Weijia(College of Resources Science and Technology, Beijing Normal University;Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education, Beijing 100875, China) 
刊 名:地理学报(英文版)  ISTIC SCI
英文刊名:JOURNAL OF GEOGRAPHICAL SCIENCES 
年,卷(期):2006 16(4) 
分类号:K9 
关键词:Beijing   wind erosion   physical principle   comprehensive tackle of sandy land  
机标关键词:北京南部沙地风蚀物理特征land surfacewind velocitywind erosionquantitative analysisunderlying surfacesediment transportsediment dischargeland usesandy landflow layerrange of 
基金项目:国家科技攻关项目,Beijing Sand Desertification and Wind Sand Countermeasure Demonstration Area Project,北京市自然科学基金 
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