this post was submitted on 02 Oct 2024
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Well, you can use dams.
The problem is really down to finding places where you can actually build something like a hydroelectric power plant.
You need a large area you can safely flood. (No villages in the area or only villages you can buy out the owners of) or a high up lake.
The area to flood needs to have the geology required to construct a dam safely.
And finally, the area needs to be pretty high up and have an area below you can direct the outgoing water to.
Yeah, but there are already built hydroeletric dams that can be reused like that.
so-called "gravity batteries" is pretty much exactly a dam with a mini-dam/reservoir at the bottom. When there is an excess, you run the motor to reverse the waterflow to pump uphill into a highe-elevation water retention pond/mini-dam.
This also helps reduce the amount of outflow water "lost" due to high-demand. Since you could take almost a day to fill the bottom reservoir and spend "wind"/solar to pump back the "lost" water downstream back into the higher-level reservoir.
Even if things are inefficient wind/solar are "renewable", so you can keep "wasting" excess to replenish the dam and still make enough money back ( think in-terms of drought, flooding, windy, sunny, cloudy, etc ) you can basically keep the high-output "system" always topped-up with water. And still supply water + electricity as it is needed. There is no "downside".
Not everyone agrees. So opinions can differ.