STUDY ON WIND-INDUCED SNOW REDISTRIBUTION CONSIDERING MODIFICATION OF FRICTION VELOCITY

The phenomenon of wind-induced snow redistribution was simulated by using the Lagrangian method, considering the modification determined by the feedback effect of snow concentration on friction velocities. Illustrated by the case of snow redistribution around a cube, the influences of the modification on the simulation results were investigated. The effects of modification was found insignificant when the wind speed was low. With high wind speeds, the influence of modifications on friction velocity or concentration in the U-shaped area around the cube where snow particles were dense became sigificant. It was also found that when wind speed increased, the number of snow particles decreased and the mass flux of deposition or erosion increased significantly.