this post was submitted on 16 Aug 2026
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Erosion is largely done by sediment being transported by the water I believe. The same principle is used in cutting water jets, it isnt the water pressure that cuts things, the water is a medium for abrasive materials
This is also how they cut rocks in ancient egypt I believe? Not with water, mind you, but would use a pretty mediocre if not useless saw but would drop sand in there, so it was actually the sand cutting the rock
Yep! The would use a saw that often had a blade made of string, like a bow, but would but gritty, sandy water in the hole they were cutting to slowly grind it away. I think they would also use “dull” copper saws (don’t quote me on that one though)
Wouldn’t the string break from the abrasive sand long before it made an impact on the stone they were trying to cut?
Change the string as it wears out. As long as it makes enough progress to justify the cost of the string it would be a decent choice.