sprinkler Droplet Size Distribution Estimation from Single Leg Test Data

ABSTRACT DROPLET size distribution data from agricultural sprinklers are useful for predicting evaporation, wind drift, and droplet effects on the soil. Collecting droplet size distribution data is tedious and expensive, so a method of estimating such data from existing or routinely collected data would be useful. The theory and technique for estimating such data using droplet ballistics are described whereby droplet size data can be estimated from routinely collected single leg data. The model was tested for five sets of conditions including three nozzle sizes and three pressures and proved to fit published droplet size data very well. The distributions produced by the estimation technique are presented.

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