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SA must face reality with basin plan : Comments
By Max Rheese, published 18/6/2019The consequence of turning formerly estuarine lakes into man-made fresh water lakes is that annually 900GL of precious fresh water evaporates from the lakes, instead of sea water.
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The 900 GL or whatever that evaporates from Lakes Alexandrina and Albert must require an environmental flow of 900/365 nearly 3 GL per day. Mainly so caravanners can sit under willow trees while upstream farmers lose their livelihoods. Open the barrages, put a salt barrier weir and lock on the river channel near Wellington, pipe fresh water from upstream (this is already done to some extent) and let the lakes become salty. Maybe dredge a channel for boat navigation and allow floodwater to escape.
Note the Colorado River, architect of the Grand Canyon, barely makes it to sea. Forget movies about pelicans the actual Coorong is a separate lagoon not part of the lakes. The Murray lakes barrages are about 75cm higher than the 1930 sea level and will be overwhelmed later this century if SLR predictions are correct.