【摘要】 暖温带半湿润地区豫北沙地相同下垫面不同风速下0—20cm高度内总输沙量随2米高处风速增大而增加:Q_0—20=7.488002—3.045697V+0.309797V²;输沙率Q_L随2米高处风速增大而以Q_L=3.743841—1.5228816V+0.153897V²,函数形式增加。上层（4—20cm）、中层（2—4cm）、下层（0—2cm）输沙量随2米高处风速增大而以不同函数形式增加,各层占输沙量百分数随2米高风速增大分别成增加、波动、减小趋势;各层输沙量随总输沙量增加而以不同函数形式增大。观测结果表明:半湿润地区豫北沙地0—20cm高度内风沙流中10％输沙量在4—7cm范围内随风速大小变动。更多还原

【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.更多还原