Simulating the effect of adding vegetative buffers around poultry barns on mean wind and concentrations of PM10 Pauls, Daryll; Christen, Andreas
Controlling emissions of particulate matter from poultry facilities is desirable to mitigate negative impacts of emissions on natural resources and human health. A potential emission management strategy is to enhance deposition on ground and vegetation inside the property line and consequently reduce dispersion to neighbouring properties. This can be possibly achieved though planting of vegetative buffers on and around poultry facilities. This report evaluates and applies a simple building-resolving flow and dispersion model to determine the effects of adding vegetation buffers around poultry barns to mitigate particulate matter (PM10) emissions leaving the property line. Different buffer layouts were studied and their potential on reducing wind, increasing concentration and deposition of PM10 was evaluated. Two different buffer layout scenarios were tested - a perimeter planting and an infill of the alleyway between barns. Sensitivities to plan area density, leaf area density and height of the vegetative buffer are quantified in terms of decreasing wind and increasing concentrations of PM10 at screen level. The model estimates that deposition on buffer vegetation was minor, and only about ~10% of the emitted PM10 could be removed by dry deposition. In none of the modeled scenarios, total PM10 leaving the property was significantly reduced. The model does not include effects of wet deposition and impactation, which could further enhance removal.
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