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滤纸色斑法是一种雨滴粒径测量方法,应用广泛,操作简单,成本低廉。本文主要是用滤纸色斑法研究不同水滴高度对色斑直径的影响和率定水滴直径与色斑直径间的关系。研究结果表明,雨滴高度对色斑直径有一定影响,率定色斑直径和雨滴直径的关系为d=0.478D~(0.610)。从房县地区实测的滤纸色斑数据计算得到,雨滴动能与降雨强度成正相关,以此作为研究水土流失量的基础。
Filter paper stain is a raindrop particle size measurement method, widely used, easy to operate, low cost. In this paper, the effect of different water droplet height on the diameter of the stain and the relationship between the water droplet diameter and the diameter of the stain are studied by the paper stain method. The results show that the raindrop height has a certain impact on the diameter of the stain. The relationship between the stain diameter and the diameter of the raindrop is d = 0.478D ~ (0.610). Calculated from the filter paper stains measured in Fangxian area, the kinetic energy of raindrops is positively correlated with the rainfall intensity, which serves as the basis for studying the amount of soil erosion.