Literally how do dams work? Also why? Didn’t we exist without them or why do we need them? Also when the damn is not open, how come the river side doesn’t like dry up because it’s not flowing? Idk if that makes sense.
In: Engineering
They’re really straightforward how they work: they block the water, and they can open up to let more water through. It’s an idea so simple that beavers figured it out, and we’ve been doing it for literally thousands of years.
We started doing it to better regulate river flow, usually for agriculture. The key concept is that they usually slow down water flow. That means the water sticks around longer and we can use it for stuff like agriculture or drinking. If there’s floods, we can open it. These days, one big use is hydroelectric power (the water that does flow is forced to spin an electric generator).
The river side *does* dry up when we block the water. Most dams cause the river they feed into to shrink. We usually only do it when we want it to happen, although in general there’s a negative environmental impact.
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