Alexandra Falls on the Hay River, NWT (Canada), April 29, 2008
Alexandra Falls is one of the most beautiful waterfalls in Canada. At ~30 m high – it is spectacular to see in summer – especially from the close vantage point offered by this lookout. Here, Alexandra Falls is captured in ice just prior to breakup 2008. This large “sail” forms at the lip every winter and seeing it break off as the river breakup unfolds is absolutely awe inspiring.
The BBC crew filming for their new series “Frozen Planet”, captured an entire time-lapse sequence of this falls opening up in spring 2009. You can see a brief glimpse of it in Episode 1 (which aired on the Discovery Channel last week) and a longer version was shown in Episode 2, which aired the same night as the first episode. Those of you in the UK and EU can also see a bit of this sequence, including the sail breaking away, in the video clip they have posted on the BBC Frozen Planet web site featuring our team’s research in Hay River. This same clip is also featured on the Discovery Channel web site for those of us in North America.
(photo by UofA River Ice Group: Nikon E7600, f/4.9, ISO – 50, focal length 8 mm, 1/794 sec. exposure time)