It's probably due to the change in elevation as well as using a lake as a chunk of the canals length, it was probably cheaper to use the fresh water instead of pumping seawater over those distances
Mostly, it was cheaper to use the lake as the majority of the water path from one side to the other than it was to dig all the way across - which probably would have been impossible.
It's probably due to the change in elevation as well as using a lake as a chunk of the canals length, it was probably cheaper to use the fresh water instead of pumping seawater over those distances
Mostly, it was cheaper to use the lake as the majority of the water path from one side to the other than it was to dig all the way across - which probably would have been impossible.