Tracer Techniques To Evaluate The Dilution
Performance Of Sewage Submarine Outfalls
Author(s)
J. Roldao, J. Pecly & L. Leal
Abstract
Fluorescent dye tracers were used to label industrial and domestic sewage
discharged in the sea water by multiport submarine outfalls in order to evaluate
the effluent dilution pattern. Uranine and Amidorhodamine G were
simultaneously injected in the outfall's pipeline during 6 to 8 hours by a
continuous injecting device and detected at different depths in the receiving
coastal water. In order to obtain sufficiently detailed information to plot the
sewage dilution plume, a large number of samples with known coordinates must
be taken in the field. Computer programs to assist the navigation of the
monitoring boat and to analyze the obtained data in the laboratory are essential.
This paper shows how fluorescent dyes can be used for evaluating the dilution
pattern of efflu
Keywords
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