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Originally Posted by The PNP
We need tidal barrages across all major estuaries. To not only generate huge amounts of free, predictable, reliable, renewable, 100% clean energy.....But critically, to protect towns and cities from the accelerating sealevel rise.
I know that there have been various schemes considered and rejected over the last 30 years or so, for various practical reasons. The Severn and the Mersey are certainly among them.
On the southern corner of the Isle of Wight , where there are four daily tides, a scheme has been proposed for more than five years but not progressed at all . Local fishermen claim it would ruin their business.
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Originally Posted by bensherman
I know that there have been various schemes considered and rejected over the last 30 years or so, for various practical reasons. The Severn and the Mersey are certainly among them.
On the southern corner of the Isle of Wight , where there are four daily tides, a scheme has been proposed for more than five years but not progressed at all . Local fishermen claim it would ruin their business.
There will always be objections, from twitchers, boat owners, fishermen, etc. But at end of day, it has to be more cost-effective to put one barrage across an estuary, than build high seawalls all the way up the shorelines on either side and far upriver.
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Originally Posted by The PNP
We need tidal barrages across all major estuaries. To not only generate huge amounts of free, predictable, reliable, renewable, 100% clean energy.....But critically, to protect towns and cities from the accelerating sealevel rise.
It's strange that an island nation hasn't really made use of hydropower. 60% of Canada's electricity is generated from hydro sources, both tidal and run of the river. A couple of Provinces generate over 90% of their electricity from hydro. In Ontario it's only 40%, but they've been generating it this way since the late 1800s.
When I first came here and heard people talking about their Hydro bill, I didn't have a clue what they were talking about. Nobody ever refers to electricity as 'electricity'. It's always called Hydro.
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Originally Posted by seivad
It's strange that an island nation hasn't really made use of hydropower. 60% of Canada's electricity is generated from hydro sources, both tidal and run of the river. A couple of Provinces generate over 90% of their electricity from hydro. In Ontario it's only 40%, but they've been generating it this way since the late 1800s.
When I first came here and heard people talking about their Hydro bill, I didn't have a clue what they were talking about. Nobody ever refers to electricity as 'electricity'. It's always called Hydro.
Agree.....Sooner or later, like NL (with their Delta Project) it has to happen. My point is, why wait till rising seas force the hand? We need the energy now more than ever and demand will only increase over time. Fishermen can be compensated, locks can be included in a barrage for boats, birdlife will adjust.....Those at the top need to bite the tidal bullet and get on with it.
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Originally Posted by seivad
It's strange that an island nation hasn't really made use of hydropower. 60% of Canada's electricity is generated from hydro sources, both tidal and run of the river. A couple of Provinces generate over 90% of their electricity from hydro. In Ontario it's only 40%, but they've been generating it this way since the late 1800s.
When I first came here and heard people talking about their Hydro bill, I didn't have a clue what they were talking about. Nobody ever refers to electricity as 'electricity'. It's always called Hydro.
Scotland in particular has enjoyed many examples of hydro power over the years - I recall visiting the big hydro station on the Clyde in New Lanark a decade or so ago.
Remember too what use to power mills and other manufacturing centres in the 1800s...!
https://www.sserenewables.com/hydro/
https://www.drax.com/power-generatio...sh-hydropower/
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There is a growing tide, forgive the pun against tidal on environmental grounds, both marine life and sediment issues.
The twitchers don't like it.
Reliability issues and expense are also problems.
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Originally Posted by local
There is a growing tide, forgive the pun against tidal on environmental grounds, both marine life and sediment issues.
The twitchers don't like it.
Reliability issues and expense are also problems.
All dams have an effect on marine life, but that hasn't prevented thousands of projects (Aswan High, Grand Coulee, etc) from going ahead. Any major coastal works, will have an influence on the local patterns of deposition and scouring of sea/riverbed materials.
When it comes to reliability and maintenance of marine turbines. Equipment installed within a dam/barrage, is easier to access, monitor and service, than an equivalent free-standing/tethered/floating/pelagic turbine. Costs are mostly up-front, i.e. in the construction and installation phase. Once operational, costs are relatively modest.
The UK is fortunate to have one of the highest tidal ranges in the World, particularly on the West coast. It's a massive 'gift-horse', that we'd be nuts to ignore. And as mentioned earlier, barrages across our estuaries are inevitable sooner or later, because the sea ain't going to stop rising anytime soon.
Last edited by The PNP; 19/05/2022 at 08:03 AM.
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Tidal barrages have a very different set of issues.
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Originally Posted by local
Tidal barrages have a very different set of issues.
These pale into insignificance, compared to the flood protection they give to towns and cities upriver. They also more than pay for themselves over time, thanks to the huge quantities of free energy they generate.
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