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How do you know water flow?

Updated: 8/21/2019
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7y ago

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Question is vague. Most would simply need to look at a river to determine that water - given a chance - will flow.

Doesn't even need a river. Get a glass, or a bottle of water. Tilt it, see what happens.

Maybe you're asking about the amount, or speed of water flow.

That's trickier. You can get an idea of speed simply by tossing something floating into the water and watch it move. Time it over a known distance, some simple math, and you get an answer in the unit of your choice.

Doesn't work that well on rivers though. Water likes to divide into layers. There might be a deeper layer moving either faster or slower.

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