吹雪防雪柵の風向による効果

Snow drifting processes and wind speed profiles by a collector and a blower snow fences were investigated in a cold wind-tunnel. The purpose is to know the effect of wind direction on drift control by snow fences. Snowdrifts were compared among the following three cases about the both type fences. One is a case which the snow fence is perpendicular to the wind direction. The others are it has tilts by 30° and 45°. When the collector snow fence had tilts, amounts of snowdrift by the fence were much less than that in the case of perpendicular to the wind direction. This mainly caused by that the half width of the fence had no effect on decrease of wind speed. On the other hand, the effect of the blower snow fence did not decrease when it had tilts to the wind direction. It is necessary to be investigated where the blown snow deposit in the case that the blower snow fence has tilts.