Rainfall‐Reaeration Effects
Publication: Journal of Irrigation and Drainage Engineering
Volume 116, Issue 4
Abstract
The effect of rainfall intensity on reaeration has not been adequately reported in the literature. It is clear that rainfall causes surface turbulence and increases reaeration, and a significant linear relationship (r = .97) was found in this study between rainfall intensity and KL(20), the corrected mass transfer rate at 20°C, an initial oxygen concentration of zero, and one atmosphere of pressure. Experimental pool data indicate rainfall can be an important contributor to reaeration, particularly in stagnant aquatic systems where oxygen saturation deficits are large. Calculations illustrating the reaeration effect of various rainfall intensities at several undersaturated sites in the Florida Everglades Water Conservation Area 2A (WCA-2A) support this conclusion and show reaeration rate increases of 23 to 103 times over normal field rates at rainfall intensities from 0.64 to 2.54 cm/hr, respectively.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 116 • Issue 4 • July 1990
Pages: 582 - 587
Copyright
Copyright © 1990 ASCE.
History
Published online: Jul 1, 1990
Published in print: Jul 1990
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