On Wed, 25 Feb 2009 23:45:37 -0000, "Doctor Drivel"
wrote:

* It involves moving about 2,500 million tons of rock to the Irish Sea

Possible, in the very, very long term. Ignoring the challenges of
quarrying, and taking a long term 50 year view it's 137,000 tonnes per
day, or more than 30 fully loaded freight trains ever day for 18000
days. The energy used in moving that amount of material will probably
outweigh the electricity produced by the tidal generation.

* Tidal lagoons created out of about 20% of the Irish Sea

Very ambitious but that 20% target has a very serious flaw (see below)

* Rail and road bridges across the Irish Sea

Completely impossible, as a few minutes examining admiralty chart 1121
would confirm. The sea bed depths are such that even an immersed sea
bed tunnel isn't realistically viable, even across what some might
deem short crossings like the North Channel.

In respect of the 20% of the Irish Sea being used as tidal lagoons,
this is almost certainly impossible as no more than 5% of the Irish
Sea is shallower than the 20m contour.


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