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Why did the proposed Red Sea–Dead Sea Water Conveyance project involve pumping water instead of siphoning it? (en.wikipedia.org)

submitted 2 weeks ago* (last edited 1 week ago) by cypherpunks@lemmy.ml to c/nostupidquestions@lemmy.ca

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The surface of the Dead Sea is hundreds of meters below sea level so it seems like pumping would only be needed to prime a siphon and then it could keep flowing. What am I missing?

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[–] smuuthbrane@sh.itjust.works 5 points 2 weeks ago (2 children)

My guess is pumping losses. Essentially there's friction moving water through a pipe, and the distance would be so long as to make said friction higher than the available suction. It would probably just start cavitating and destroy the pipe.

[–] gramie@lemmy.ca 1 points 1 week ago

Also, the maximum pressure you could have enough siphon is the difference in air pressure between the two ends. If you want more pressure, you have to pump.

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