The Murray River ends in a vast shallow lake, called Lake Alexandrina. Surrounding the lake are farms, towns and on Hindmarsh Island a marina and new housing development. At the bottom end of the lake are five sea dykes that stretch for a total of 7.6 kilometres. The sea dykes are known locally as barrages. The sea dykes have dammed the estuary.

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Barrage locations

Of course evaporation from Lake Alexandrina is significant, in the order of 850 to 1050 Gl per year, read more here.

It’s not exactly a pristine environment, and housing estates are being developed on the promise of more freshwater. Hindmarsh Island red car 2007

Find out more about the property developments by clicking here.

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