Day Zero, Cape Town, South Africa

[Anomalocaris]

Cape Town regulates the sonderend watershed as it is.  An aqueduct would/could only serve the purpose that the damn infrastructure already accomplishes.

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Heres a handy image - in order to contextualize the comments above.

There is a collection of lakes about 150-200 miles north by north east of Capetown, with an intervening mountain range with appaarently low paths in between.  If these lakes have adaquate refill rate, then It might possible to build an pumped aqueduct from the lakes to Capetown similar to the Los Angeles aqueduct, which originates from Mono Lake almost 400 miles north of LA, Travels down Owen valley and is pumped over the tahachipe range north of LA into LA basin.   The power used to pump the water over the mountain range is far less than what it would take to desalinate a comparable amount of sea water.   Capetown appear to have similar population to LA and presumably broadly similar water needs.