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this post was submitted on 31 Jul 2023
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How is hydro power no longer needed?
I don't think @LexiconDexicon@lemmy.world said hydropower is no longer needed. They just said there's no need for so many dams anymore, and I think that's correct in this case.
A lot of these older and extremely underpowered dams were built in important riverways. They decimated salmon runs but produced only small amounts of power in return. For a recent example, Elwha Dam removal in Washington State comes to mind. It and another dam produced only 38% of the electricity needed to operate one sawmill, but it killed salmon habitats. You can read a little about it here: https://en.wikipedia.org/wiki/Elwha_Dam
No clue why he would think that. Hydro power is the best source of carbon-free power. It's also the only reasonable way to do grid-scale storage we have. Unless we see a huge build-out in nuclear, hydro-power will be required for the next century.
I have no clue either as you misread what I wrote. MicroWave is correct, that was my meaning.
That's not true. There's TONS of viable alternatives. ex:
Pumped storage hydro is exactly what I was talking about when I said hydro is the only reasonable way to do grid-scale storage we have.
When your alternative is something that doesn't exist yet, you are reinforcing my point that hydro is the only viable grid-scale storage tech we have right now.
What's not well known is that dams also have a limited life -- they silt up. They produce most hydro power when new, which declines as silt fills the dam, raising the bottom/lowering head.
There's a great book I have somewhere, is it CADILLAC DESERT? about the big 20th century push to "tame nature" and dam every river to make it "produce". Total folly.