摄影法在人工降雨装置水滴终点速度中的应用研究

Study on the Method of Photograph Application of the Rainfall Terminal Speed in the Artificial Simulating Rainfall Equipment

结合实例详细介绍了摄影法在测定人工降雨装置水滴降落终点速度的应用。试验结果表明；在不同雨强下相同粒径的水滴降落速度相同，与理论值之间的差别介于0．01～0．05m／s，其原因主要是由于测量时有部分水滴的位置并不是打击地面时的位置。通过分析软件SPSS对雨强与平均终点速度的相关性分析，得出雨强与平均终点速度无相关性。试验认为该方法用于测定水滴降落终点速度可行，其方法简单、易操作，为以后从事此方面研究的工作人员提供了科学依据。

The method of photograph is applied in the artificial simulating rainfall equipment to measure the rainfall terminal speed. It can be concluded that under differenet rainfall intensity have the same rainfall speed with same rainfall diameter. Contrast to the theories,the difference between 0.01 m/s and 0. 05 m/s ,the main result is when measuring have part of rain drop do not attack the position of ground. The software SPSS analyze the data,the result indicates that there is no relation between rainfall intensity and the average rainfall terminal speed. The method used for the measurement of rainfall terminal speed is feasible ,and it is simple and easy to operate, which provides scientific basis for researchers engaged in this aspect.