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1 September 2007 Experimental Study of Blown Sand in a Vegetated Area
Keiko Udo, Satoshi Takewaka
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Wind-tunnel experiments were conducted to investigate the effects of vegetation, in particular beach grass, on blown sand in terms of elevation changes of a mobile sand bed and distributions of mean wind velocity for various vegetation canopies. For flexible vegetation layer displacement amplitude of vegetation leaf sway was also measured. The results indicate that a vegetation canopy with low height, high density, and vegetation flexibility is effective in reducing the sand-transport rate. Within and above a canopy of flexible vegetation, the vibrations of leaves increases the air turbulence, which creates a complex interaction between the mean wind velocity and the air turbulence, and thereby reduces the wind velocity in the vegetation area; consequently, the sand-transport rate decreases.

Keiko Udo and Satoshi Takewaka "Experimental Study of Blown Sand in a Vegetated Area," Journal of Coastal Research 23(5), 1175-1182, (1 September 2007).
Received: 26 April 2005; Accepted: 11 July 2005; Published: 1 September 2007
aeolian sand transport
beach erosion
wind tunnel
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