Typically in a pond where the water level drops, the ice along shore will slope down to the water, then the ice floats on top of the water. Ice will have a hard time staying horizontal if the water level drops as it is only frozen to dirt.

Just like you trying to hold a sledgehammer at arms length, the further away from the anchor point (your shoulder) the harder it is to hold up. Ice does the same thing.

Somewhere on youtube is a video of ice in a pond breaking from air forced in from an aerator. The ice looks like a balloon.


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