Experimental evaluation demonstrates uniform continuous rainfall simulation across a large plot, indicating an inexpensive method for erosion research.
A simple, inexpensive, continuous-application rainfall simulator was developed using air injected into a water conduit. The effect of injecting air was to maintain higher discharge pressures enabling better uniformity without increasing the rainfall intensity. The air/water mixture and discharge pressure were varied to control intensity and drop size. Intensities ranging from 76 to 168 mm/h with a minimum distribution uniformity of 84 percent were produced; and drops were produced with size, velocity, and impact angles approximating natural rainfall. The simulator was designed for an effective area of 6 m x 6 m but can easily be modified
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Shelton et al. (1985) studied this question.
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