Moon <r...@w...pl> napisał(a):
[...]
> żeby nie demonizować "ruchu" wody jako panaceum na zamarzanie, nalezy dodać,
> że bodajże w 1936 roku zamarzła nawet... Niagara.

To nie Niagara zamarzła (jeśli to tak mozna nazwać) ale tzw.
The American Falls i to kilka razy:
"The American Falls water flow was reduced to such an extent
in 1909, 1936, 1938 and 1949 that it froze over."

Niagarze to sie nie przytrafiło albowiem, jeśli nawet to zawsze
płynęła pod lodem. Jak to rzeka.
The Niagara River handles 212,000 cubic feet of water per second.
The average depth is approximately 16 feet with a flow rate of 4
to 8 miles per hour. The Niagara River does not freeze over.
The Falls of Niagara and the river below the Falls does not freeze either.
The volume of water going over the Falls, the depth and speed of
the water below the Falls also precludes freezing.
The water will not be stopped or frozen solid.

http://www.iaw.com/~falls/faq.html

I jeszcze to:
On six reported occasions (1883, 1896, 1904, 1909, 1936 and 1947),
the water flow over American Falls has been totally blocked by ice
and ceased to fall. But only once has this happened to the much
larger Horseshoe Falls (originally known as the Canadian Falls):
March 29-31, 1848, the Days Niagara Falls Went Dry.

http://www.islandnet.com/~see/weather/almanac/arc200
0/alm00mar.htm

pozdr. Jerzy

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