Saline Intrusion in Marine Effluent Outfalls

by Kamil H. M. Ali, Univ of Liverpool, Liverpool, United Kingdom,
A. E. Wose, Univ of Liverpool, Liverpool, United Kingdom,

Document Type: Proceeding Paper

Part of: Coastal Zone '91


The paper presents an experimental investigation of saline intrusion in long sea outfalls. This intrusion is caused by the influx of sea water that may occur during periods of low discharge, resulting in impairment of effluent dispersion. Experiments were conducted to study the hydraulic effects of saline wedges in open-ended outfall pipes. Four different outfalls were used. Saline-wedge profiles and velocity distributions in the moving upper layer were obtained. The influence of wave action upon the performance of a multi-riser outfall was also studied. It was shown that intrusion was increased by the presence of waves of certain periods.

Subject Headings: Water waves | Salt water intrusion | Salinity | Effluents | Water discharge | Velocity profile | Velocity distribution

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