The Blavet estuary

The Blavet estuary starts upstream of Hennebont, at the last lock Polvern. Here and over 15 kilometres, the river water mixes with the incoming sea. The landscape reveals this meeting between fresh and salt water. The wooded banks alternate with reedbeds and marshes, flooded during very high tides. The influence of the sea is strong here, offering a landscape of salt meadows and mudflats. Century after century, sediment has filled the bottom of the valley, giving the Blavet its meandering aspect, and allowing the mudflats to be colonised by salt-loving plants called halophiles.