ABSTRACT
Fluorescent dye tracers were used to label industrial and domestic sewage introduced in the sea by submarine outfalls aiming to evaluate the effluent dilution pattern in the sea water. 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 later plot the plume of sewage dilution, a large number of samples attached to theirs respective 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 provides indications on how fluorescent dye tracers can lead to a better understanding of the effluent dilution in the sea with answers that are also valuable for water quality modeling.
