Fontaine de Fontestorbes timelapse




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Published on Aug 26, 2013

Short timelapse video of variable flow-rate waterfall, La Fontaine des Fontestorbes.


A combination of reduced inflow during the summer and a unique inverted U-bend tunnel causes

a siphon effect to increase the outflow from the cave. As the water level in the cave falls, it falls

below the opening to the siphon tunnel, so the siphon stops (just like allowing air into a regular

siphon made with a tube or garden hose). The outflow rate decreases and the cave fills again,

until the siphon tunnel is completely submerged and the siphon effect commences once again,

increasing the outlfow from the cave.

The whole cyle lasts between 40 and 90 minutes.

This timelapse was filmed on a Canon IXUS 230HS mounted on a Gorillapod Original. The

Canon was loaded with the CHDK firmware and an Intervalometer script.

I shot one frame every 10 seconds and stitched the whole lot together GoPro CineForm Studio.

Since night was falling, the sequence darkens somewhat towards the end.



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