Measurement on physical parameters of raindrop energy.
Rainfall erosivity factor (R) is one of the most commonly used factors in soil erosion models. While rainfall energy (E) is the most elementary physical parameter to predict R. Based on comparative analysis of previous soil erosion models and rainfall erosivity factor measuring methods, integrated application of modern photogrammetric techniques, image analytic methods and automatic control theories, this paper provided a new method based on image analytic to calculate the rainfall energy and R factor, which obtains raindrop's volume and velocity by means of modern photogrammetric technique. Results show that this method can improve both efficiency and accuracy of rainfall energy calculation and other rainfall physical parameters measurement.
Institute of Soil and Water Conservation, Northwest A & F University, Yangling, China ; Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, China.
Minghang
M
Guo
Resource and Environment College, Northwest A & F University, Yangling, 712100 China.
Jinshi
J
Jian
Institute of Soil and Water Conservation, Northwest A & F University, Yangling, China ; Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, China.
Zhun
Z
Zhao
Institute of Soil and Water Conservation, Northwest A & F University, Yangling, China ; Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, China.
Juying
J
Jiao
Raindrop energy (E); Rainfall erosivity factor (R); photogrammetric measurement; physical parameters of raindrop