Re: Tides on inland waters in Glorantha?

From: John Galloway <yuskim1_at_BKjuX6-vQLgE9siGkuAOV5Q4Cu8nBwwmRJAKmEd1lRZjFeTmL_ZoUHGhTi3kKMOo8L20>
Date: Fri, 30 Mar 2007 07:15:39 -0000

>
> The White Sea is actually connected by a very long tunnel under the
> ice of the Glacier.
> Thus is has tides.

To raise or lower a body of water the size of lake Superior (31,820 square miles) by 3 feet via a (submerged) tunnel would require that nearly 20 cubic miles of water flow through it in roughly 6 hours. If, say, the (average) speed of the flow was 100 miles per hour and if the tunnel had a circular cross-section it would have to be over 1000 feet across!

So either the White Sea tunnel is a gigantic structure filled with water flowing at deadly speeds or (as seems more likely) tides in Glorantha are not determined by the (real world) physics of fluild displacement. But if the latter is actually the case then (and this is the point of my post) ...

Why is the presence of White Sea tides dependent on the existance of a tunnel at all?

Thanks,

• John