On Fri, 2009-01-09 at 09:52 +0000, Andy Greener wrote:
> > Probably, but we can still have a bit of fun debating the thermal > transmission properties of a narrow lock (Wheaton Aston). Does more > warm water get through a lock with or without a boat in it, and what > about wide/broad locks? Does length matter? ;-) A lock certainly does have a effect on the freezing of the water in the vicinity. Last weekend the S&W in the Kidderminster area was frozen hard up to a depth of 15-25mm. The water above Caldwall lock was frozen right up to the top gates. The lock was full and completely frozen. However below the lock was ice free for a distance of about 40-50 feet. I guess that was due to the movement of the water from the flow through the leaky bottom gates. Steve -- Follow our waterways wanderings on www.justheaven.org.uk [Non-text portions of this message have been removed]
