Carey Robson wrote:

Using air and/or water temperature to relate to river grades perverts the
river grading system. Dress for the water temperature on rivers. On the west
coast of Canada you can almost always see the snow that the river is coming
from. It isn't hard to figure the water temperature.

Yep, I agree. Paddling glacier melt rivers in the middle of the summer,
one learns that lesson very quickly! If I'm too hot, I'll roll to cool
off, if I'm too cold because I didn't wear enough for the water temp, I
might die.

--
Wilko van den Bergh wilko(a t)dse(d o t)nl
Eindhoven The Netherlands Europe
---Look at the possibilities, don't worry about the limitations.---
http://wilko.webzone.ru/