Abstract
The validation of the rainfall simulator should produce average drop diameter with impact velocity and kinetic energy of impact similar to drops in natural rainfall. The objective of this work is develop, build, calibrate and test a small portable rainfall simulator. The rainfall intensity is controlled with a solenoid valve and a cyclic digital timer. Close-open relation range of the solenoid valve can produce rainfalls between 63 and 106 mm/h. The Christiansen, Statistical and Uniformity coefficients were considered appropriate and with a good uniformity of water distribution. The agreement between simulated and natural rainfall kinetic energy was a good relationship. Thus, the rainfall simulator developed meets the technical requirements established in the literature and can be used in many agricultural and environmental sciences tasks
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