Journal of Geographical Sciences ›› 2006, Vol. 16 ›› Issue (4): 487-494.doi: 10.1007/s11442-006-0413-7

• Climate and Environmental Change • Previous Articles     Next Articles

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

YUE Depeng1, LIU Yongbing2, WANG Jiping1, LI Hailong1, CUI Weijia2   

  1. 1. The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China|
    2. College of Resources Science and Technology, Beijing Normal University|Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education, Beijing 100875, China
  • Received:2005-04-11 Revised:2006-04-15 Online:2006-12-25 Published:2006-12-25
  • Supported by:

    The national “Tenth-Five Year Plan” Key Program of Science and Technology, No.2002BA517A14; Beijing Sand Desertification and Wind Sand Countermeasure Demonstration Area Project, No.H020720110330; Key Project of Natural Science Foundation of Beijing, No.8011003

Abstract:

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.

Key words: Beijing, wind erosion, physical principle, comprehensive tackle of sandy land