Author(s)

H.P. Noppen

Abstract

Between the city of Tunis and the Gulf of Tunis there exist two lakes: The North Lake and the South Lake, separated by the Navigation Channel. This channel connects the Port of Tunis with Port la Goulette. Both lakes and the channel have been polluted for a very long time both by continuous sewage-water discharges from the city and as a consequence of industrial activities. The North Lake was already cleaned and restored in the mid eighties. The South lake can be seen today, from a hydro-biological point of view, as a dead system. The surplus of nutriments in the lake even influences the quality of the water in the Gulf of Tunis, in which the South Lake discharg

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