Water jet cutting

KG:

A foot a year, eh? Thats like 60 minutes X 24 hours X 365 days or

526,600 minutes a year. Divided into 12 inches = .000022787 inches per minute. Actually, 22 millionths per minute is much more than I thought it would be. Any customers would need a hell of a lead time cutting at that rate.

Sure, but given that the falls are 1060 feet long and 176 feet tall, that translates into 612.165 cubic inches of material removed every minute.

Yellow Bellied Sump Sucker (maybe). This one seems a little high, if you keep an eye on the auctions you can get them for less.

Well, here's a Q:

If the waterfall is being eroded back so quickly, how are the turbines able to still catch the water? Are they being moved back, to keep up?

On Sun, 24 Jan 2010 19:01:42 -0500, Stuart Wheaton wrote as underneath

And where does all the power come from to pull the CO2 out of the atmosphere, liquify it ,solidise it , cart it around the country! Just because a bit of the system is a by-product of a massively G warming industry doesnt mean that it doesnt really count!

Blink blink...ooookay.~ Good question!

Snip

What about one of those swimming pool cleaning units that used to flap arount the bottom of a swimming pool and collect all the dirt from it? They moved around in a random fashon, and eventually covered all the bottom of the pool. The water from it could be settled andreturned after filtering for re-use

Proly there are horizontal "catch tubes" for the turbine water? That mebbe already go back a cupla hundred feet into the upper river. But, as the erosion continues, those horizontal lengths become less and less supported..... We should be able to see those horizontal catch tubes in google maps. Inybody got a zip code??

Most of the water is diverted to ponds about 3-4 miles upstream.

Paul K. Dickman

Oh, yeah, saw sumpn about that on History.... really quite an engineering feat. Here ahm thinkin effing paddlewheels at the base of the falls..... :)

Still, that erosion rate is incredible. Who'da thunk?

The turbines (powerhouse) are not AT the falls, they are downstream in the gorge. They work on the difference in water height between the upstream and downstream side of the falls ... just like if a dam were present. The water to the powerhouse is diverted from the river a considerable distance upstream (above the falls), and brought to the powerhouse via a canal. From the canal at the top of the gorge, the water is then dropped to the turbines at the bottom via the usual penstocks (large tubes).

Variations of this are used in most waterfall-related power stations. Tthe falls themselves are usually not involved in the power generation at all.

Dan Mitchell ============

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Gunner

Ther are a variety of power stations tapping the water resources of Niagara, some in the USA and some in Canada. Each uses a slight variation of the basic system I described earlier. Google: "Niagara power generation". For some examples see:

One of the oldest installations, the Schoellkopf Electric power station, was destroyed by a landslide in the 1950's, when the highwall collapsed onto the powerhouse. It was quite the mess.

There are motion picture films of this happening.

The results looked similar to the recent massive damage at the Russian dam and powerhouse, caused by poor maintenanace of the turbines. That incident was posted here earlier.

Dan Mitchell ============

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Since the CO2 is an early fraction as you cool air to liquid, it is essentially free, since it has commercial value it is captured instead of vented. The power would be consumed anyways.

This is not much greater than the energy required to haul and use traditional blasting media, but because it is evaporated after use, the energy required to collect and transport the used grit is largely eliminated.

Sure, but until we figure out how to build infrastructure that does not need to be maintained, then something has to be done. Perhaps we can give 100 inmates a wire brush??? but then you'd have to haul them to the job site, erecrt scaffolds, and they'd need more food because they were working harder, and that food production would generate more CO2...

Can't use this as the sand in the sand filters - iron in it will stain the pool and corrode the copper pipes. Other metal can do like nasty.

Wondering if you do Al and steel and get both together... dislike metals conduct current and that combo is termite.

The metal in it would be a problem.

Pretty cement would stain, but not make a difference in some places or oil/tar would be just fine.

Mart> Snip

They are on a custom made channel and way up channel as well.

Mart>>>

The diversion dam (where water is redirected into the penstocks) is probably a few hundred yards upstream of the falls. The penstocks carry that water a few hundred yards downstream of the falls to the powerhouse. So the diversion dam may have to be moved upstream every few thousand years.