Le Mascaret

The Tidal Bore is a very spectacular natural phenomenon that occurs in about sixty sites around the world.
At the confluence of the Garonne and the Dordogne rivers, a wave is created on the rivers, the first wave of the rising tide. At this point, the mouth narrows allowing the force of the tide to be concentrated. A difference in wind and water height is established between the two rivers and breaks the balance.
The current tends to re-establish itself energetically creating the Tidal Bore phenomenon.
There are two tidal bores per day, that is to say 730 per year of which only about fifty are remarkable.
The tidal bore moves at a speed of 10 to 20 km/h, the wave can reach 1.36 m.
As the bottom changes, the succession of waves moves along the width of the Dordogne and digs, flattens, bulges, breaks, bubbles, disappears, reappears.