What is pondless waterfall?
What is pondless waterfall? A Pondless Waterfall is simply a re-circulating waterfall or stream without the presence of a pond. Pondless waterfalls work by pumping water contained in a large, in-ground reservoir up and through the Waterfall Spillway, allowing the water to flow back down into the reservoir.
Why do waterfalls not freeze?
Unlike a lake or pond, a waterfall and its source -- rivers and streams -- are constantly moving and mixing the water. But if the temperature stays below freezing for an extended period of time, the water will supercool. That means it's below 32 degrees but still liquid. During that process, frazil ice forms.