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利用风速廓线法测定小麦不同生长期的空气动力学粗糙度:青苗期的平均粗糙度最大,为6.0078cm;收割后的平均粗糙度为0.0797cm,返青期的平均粗糙度为0.7211cm。Marticorena起动摩阻风模式的模拟结果显示三个时期的起动摩阻风速分别为98.93cms-1、24.89cms-1和46.85cms-1。小麦收割后的农田是粉尘释放的源区。
The aerodynamic roughness of wheat at different growth stages was determined by wind speed profile method. The average roughness at young seedling stage was 6.0078 cm, the average roughness after harvesting was 0.0797 cm, and the average roughness at turning-back stage was 0.7211 cm. The simulation results of Marticorena starting frictional wind mode show that the starting frictional wind speeds of the three periods are 98.93cms-1, 24.89cms-1 and 46.85cms-1, respectively. Farmland after wheat harvest is the source of dust release.