3 ms·
Hydro also has non-trivial enviromental impact - you are creating pretty big "lake" above the dam. And if you want to turn it on and off, you'll need one more t
by exyi 9y ago
Hydro also has non-trivial enviromental impact - you are creating pretty big "lake" above the dam. And if you want to turn it on and off, you'll need one more to make the flow normal again.
- acidburnNSA 9y agoAnd that reservoir can emit very significant biogenic methane. Large reservoirs for pumped storage are likely not a scalable option for climate change.
- acidburnNSA 9y agoFor the downvoters, here are scientific references [1,2]. I was shocked too. [1] http://pubs.acs.org/doi/abs/10.1021/es401820p http://pubs.acs.org/doi/abs/10.1021/es401820p [2] http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0161947 http://journals.plos.org/plosone/article?id=10.1371/journal....
- IndrekR 9y agoOne thing to note. While biogenic and thus "green", the methane is about 30 times as potent greenhouse gas (over 100 years), so we can not consider pure "carbon footprint" here. There are similar problems with restoring wetlands and undraining peatlands, which used to be carbon sinks, where biogenic methane production goes up for a while. There are also problems with N2O emissions on the reservoirs, specially near the agricultural regions. And this is all without even talking about reducing biodiversity and destroying spawning areas for the fish by filling those with mud. So yes, efficiency is not always friendly.
- IndrekR 9y agoThis is true. High efficiency and low carbon emission are not always in the same boat.