"Ron Jones" <[email protected]> wrote: >When we had the GRP cruiser (moored on the Stort), that used to get frozen >in most years (so near London and so cold...).
Almost all river navigations include lengths of channel through which no (significant) flow of the river passes (lock cuts, etc.). These are almost as liable to freeze as lengths of canal -- in fact, many are in effect lengths of canal. A large proportion of the Stort navigation consists of such lengths. I've seen the cut below Hertford lock freeze only once in the >15 years I have moored downstream of it. However, I've never seen a flowing section of the Lea freeze. It is possible for a river to freeze, though -- well, at least the surface of it. Even the Thames through London once used to (before the old London Bridge, which used to obstruct the flow significantly, was replaced). As a possibly slightly extreme example, the (navigable) Yukon River freezes every winter. It is quite impressive (visually and aurally) when "the ice goes out" on it, which is when the ice breaks up and moves downstream in the spring, normally in April, I think. It is all over in a surprisingly short time. Adrian Adrian Stott 07956-299966
