CTV News featured the flood the night of April 24, telling the stories of local residents and cabin owners who are beginning to lose the fight against the rising flood waters.
I don't want to detract from those owners' grief or hardship; I can't begin to imagine how difficult and agonizing the situation must be for them.
But the CTV reporter made what I think is an obvious error. Standing in rubber boots in a flooded yard, with the lake behind her, she said that the waters will rise more once the lake's surface ice, visible in the shot, melts over the coming weeks. The story is repeated on CTV's website, here, and here's the quote:
As the lake's ice cover melts, water levels are expected to rise further, with the peak not expected for three more weeks.
This is a glaring error that more and more people make these days, especially when some environut worries about melting icebergs. When ice floating in water melts, the water level will drop. This is because, as any fourth grade student will tell you, ice has more volume than water. As it melts and changes back into liquid, the overall volume it requires decreases.
You've all filled an ice cube tray and seen it come out with ice cubes that take up more space than the water you put in the tray. That's because ice is about 9% less dense than ice (neatly explained by the good folks at Elmhurst College), and when the same amount of matter becomes less dense it requires more volume.
Now there may be a scenario in which the ice dams and causes a rise in water behind it, but the visual and the scenario the reporter explained don't refer to that. Just how does a network reporter get away with such a obvious mistake?