Research on Filter Paper Splash Procedure of Raindrop Diameter

Filter paper splash procedure is a kind of measuring means to raindrop size. It is used widely and operated briefly and its cost is low. The article mainly introduces the influence of different heights to the stain diameter and the relationship between stain diameter and the raindrops. According to the experiment, the relation between the stain diameter and the raindrops is d=0.478D^0.610.it is the research foundation of filter paper stain method. According to the data from Fangxian area using the method of filter paper splash procedure, we can conclude that the raindrop kinetic energy has a positive relationship with rainfall intensity. The research is useful for measuring the water and soil loss.Water and soil loss is one of the global environment problems. The most important factor which can cause water and soil loss is rainfall. The research on raindrop kinetic energy is important for the further analysis of water and soil loss. A classical approach for the research on raindrop kinetic energy is paper splash procedure. The relationship between stain diameter and raindrop diameter shall be calibrated in this approach. In general, influences from titrated water drop height and stain diameter are not considered in the calibration process. In this experiment, influences of rain drop height on stain diameter are researched in the stain calibration, settling basis for the research on local volume of water and soil loss.