关键词: 半湿润区, 风沙流结构, 拟合模式

Abstract: On the sandy land in northern Henan of warm-temperate semihumid zone,the total rates of sand transport at 0-20cm above gronud surface increase with increasing wind velocity if they have same underlying surfaces. The sand trasport rates of upper layer (4-20cm),middle layer(2-4cm) and lower layer (0-2cm) respectively increase with the increasing wind velocity at 2m above ground surface in different function forms, while the percentage of sand transport rates of each layer respectively exhibits a increasing, fluctuating and decreasing trends. Observation results show that on the sandy land in northern Henan of semihumid zone, 10 percent of sand trasport rate at 0-20cm above-ground surface are distributed in 4-7cm layer.