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Disposal of wool scouring effluent in an estuarine environment

Cameron, I. and Ho, G.E. (1985) Disposal of wool scouring effluent in an estuarine environment. In: Australasian Conference on Coastal and Ocean Engineering, 2 - 6 December, Christchurch, New Zealand pp. 183-192.


A wool scouring plant discharges its waste effluent into the Swan River Estuary in Western Australia via a submerged outfall on an ebbing tidal flow. A feature of the outfall is that it discharges counter-current to the ebbing flow. The objective of the work reported in this paper was to investigate the dispersion of the effluent by laboratory simulation and field study. The laboratory simulation was achieved by applying the concepts of dynamic similarity and secondary scaling ratios to provide relationships between protype and model. The trajectory and dilution characteristics of the simulated buoyant jet were determined by microdensitometer scanning and computer assisted analysis of photographic negatives, complemented with the placement of a light probe in the plume. These methods, which we believe to be novel for this particular application, were developed to assess whether waste effluent dilution by counter-current discharge was superior to that of the conventional co-current method of discharge on an ebbing tidal flow within an estuarine environment. The agreement between the results of the various methods was good, and indicated that there was little difference between counter-current and co-current discharge.

Publication Type: Conference Paper
Murdoch Affiliation: School of Environmental Science
Publisher: Institution of Engineers, Australia
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