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 ABSTRACI

Wind tunnel experiments were conducted to assess ways in which fed sand can affect the nature of sand transport. A series of sand flux measurements at three preselected different shear velocities using sand fed at three different heights were performed on a 2 cm thick bed of sand (mean grain diameter; 275 pm). The characteristic parameters of the laden bed and the rate of sand transport were then compared. In general, it was found that the total sand flux can be significantly altered by the height at which sand is fed into the wind flow. Trends observed in the experimental tests indicate that the presence of an upstream sediment source has a direct influence on the sand flux and the general wind speed profile.