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  • http://hdl.handle.net/10402/era.29316
  • Effects of a natural windbreak on dust dispersion in the neutral surface layer
  • Mao, Yiwen
  • English
  • natural windbreaks
    road dust control
    environment
    air quality
  • Nov 1, 2012 9:37 AM
  • Thesis
  • English
  • Adobe PDF
  • 31506767 bytes
  • Field experiments were conducted in Indian Head, Saskatchewan in order to study the effects of a natural shelterbelt (width-to-height ratio W/H = 0.5) on dust dispersion from a gravel road. Transects of dust concentration sensors running normal to the road were placed both in the lee of the windbreak and in an adjacent unsheltered region. A Lagrangian stochastic (LS) model was developed to compute the theoretical ratio (c/Q) of concentration to emission rate and infer time average concentration (c) and the ensemble mean concentration transient. In about 69% of cases the inferred time average concentration lay within a factor of two of the corresponding observations (FAC2 = 69%). The modeled and experimental results suggest that the natural windbreak is not effective in filtering small dust particles (D ≤ 20 μm), but that windbreak entrapment can be a significant mechanism to remove large dust particles (D ≥ 50 μm).
  • Master's
  • Master of Science
  • Department of Earth and Atmospheric Sciences
  • Spring 2013
  • Wilson, John (Earth and Atmospheric Science)
    Kort, John (Agroforesty Developement Centre of Agriculture and Agri-Food Canada)
  • Gerhard Reuter (Earth and Atmoshperic Science)
    John D. Wilson(Earth and Atmoshperic Science)
    Kort, John (Agroforesty Developement Centre of Agriculture and Agri-Food Canada)
    Carlos F. Lange (Mechanical Engineering)