A rainfall simulator was used to apply a consistent rate of uniform rainfall to packed soil boxes in a study of the fate and transport of urea, a nonpoint source environmental contaminant. Under uniform soil and rainfall conditions, antecedent soil moisture content exerted strong control over urea loss in surface runoff.
Kibet, L. C., Saporito, L. S., Allen, A. L., May, E. B., Kleinman, P. J. A., Hashem, F. M., Bryant, R. B. A Protocol for Conducting Rainfall Simulation to Study Soil Runoff. J. Vis. Exp. (86), e51664, doi:10.3791/51664 (2014).