Windbreak walls installed on livestock farms have recently been adopted as a best management practice by producers to mitigate dust and odor. A multi-row vegetative shelterbelt and a structural windbreak wall were installed on a broiler farm, downwindat different groups of tunnel ventilation fans in year 2007 and 2009. The synthetic windbreak wall consists of five 8 xlO ft shade-cloth flat panels fastened on tube posts. The efficacy of synthetic windbreak wall was evaluated using multiple wind vaneand anemometer sensors in the vicinity and downwind of the windbreak wall. Wind rose pattern from these sensors were generated. Mean air velocity reduction at 20 ft downwind of the wall was about 30%. Windbreak wall has shown to be effective in reducingfan-made wind within 40 feet of the protection distance. Windbreak walls installed close to the fans not only trapped dust on the screen, but also effectively absorb wind energy and reduce its velocity to allow dust deposition immediately downwind. Smokebombs were used to visualize the airflow dispersion from the tunnel fans.
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