中国沙漠 ›› 1990, Vol. 10 ›› Issue (4): 9-17.

• 论文 • 上一篇    下一篇


贺大良1, 申健友1, 刘大有2   

  1. 1. 中国科学院兰州沙漠研究所;
    2. 中国科学院力学研究所
  • 出版日期:1990-12-20 发布日期:1990-12-20

Three Forms of Movement of Blowing Sand and Their Measurement

He Daliang1, Shen Jianyou1, Liu Dayou2   

  1. 1. Institute of Desert Reseach, Academia Sinica, Lanzhou;
    2. Institute of Mechanics, Academia Sinica
  • Online:1990-12-20 Published:1990-12-20

摘要: 叙述并评价了风沙运动三种形式中现有的测量仪器,并提出了研制、改进的方向。对常风下三种风沙运动方式中占绝大多数的跃移运动的观测仪器,作者认为:目前通用的惯性集沙仪是现有各类集沙仪器中最好的。对惯性集沙仪的收集效率进行了测定并提出了影响收集效率的因素。

Abstract: Thus far there is no ideal instrument for measurement of three forms of movement of blowing sand. First of all,the measurement of creep load can only be done in the laboratory,its field measurement is simultaneously conducted with saltation load. In the observation processes of saltation movement attention should be paid to the surface stability to avoid vortex caused by sand-taped instrument, which will exert influence on the sand collection. Secondly, there is no suitadle instrument to measure suspension load, while the dust-taped instrument adopted by environmental protection departments can only be used to trap particles less than 20 u,especially less than10u,which is not suitable ror measurement of suspension load discharge Therefore, there is an urgent need to develop a new instrument for trap of larger suspension particles (20-100u). The existing inertial sand-taped instrument could be successfully used to measure saltation load, which usually makes up a majority of the total sand discharge , but its trap efficiency is poor for finer particles. The factors affecting the trap efficiency of existing inertoal sand-taped instrument were analysed.