The diameter and velocity of spray droplet on different slopes under no wind were measured by
two-dimensional video disdrometer. The change regularities of average droplet diameter and its cumulative
frequency along spray direction under different slopes were studied. The relationship between the average
droplet diameter,velocity and slope were established. Based on the calculation method of water
distribution,the model for calculating droplet kinetic energy intensity distribution of sprinkler irrigation on
sloping land without wind was proposed. The model was validated by experiment. The Rainbird LF1200
sprinkler was selected as the research object,and the influences of sprinkler layout,spacing and slope on
the kinetic energy intensity distribution of combined sprinkler were mainly analyzed by the model. The
results showed that droplet kinetic energy intensity distribution uniformity and the proportion of high value
area of kinetic energy intensity were both decreased as the sprinkler spacing was increased. The effect of
slope on kinetic energy intensity distribution was insignificant. Layout of sprinklers with triangular lattice
was useful to decrease kinetic energy intensity of the sprinkler on sloping land. If the Rainbird LF1200
sprinkler was used for designing sprinkler irrigation system on sloping land,the sprinkler spacing was
recommend as 0. 8 times of the spraying range on flat ground with the triangular lattice layout,considering
the impact of kinetic energy intensity and water distribution simultaneously.
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