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by idlephysicist 884 days ago
I was also confused by this, I had always (perhaps naively) assumed that the canal used salt water throughout. I did some searching and found this article.

> Gatun Lake, which forms a key stretch of the canal system and provides fresh water for its locks, saw little rain this year, as El NiƱo triggered a withering drought.

https://fortune.com/2023/12/04/panama-canal-dry-backed-up-br...