The reaeration caused by a series of natural cascades on the Arrudas River was studied. Experimental results were compared with theoretical ones given by formulae available in the literature and showed no positive agreement. An empirical formula was derived and further simplified for use in a more generalized way, giving very good correlation with observed dissolved oxygen values. This formula was tested in two other cascade systems, giving acceptable results. A sample calculation for a simulated situation is presented, showing the methodology to be employed in cascades of similar configuration.
Marcos von Sperling; A Study on Reaeration in River Cascades. Water Sci Technol 1 May 1987; 19 (5-6): 757–767. doi: https://doi.org/10.2166/wst.1987.0254
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