Liane

The Liane is a 37 km river in the Pas-de-Calais department in northern France. It rises in Quesques and flows into the English Channel at Boulogne-sur-Mer. Other communes along its length include: Selles, Brunembert, Bournonville, Alincthun, Crémarest, Wirwignes, Questrecques, Samer, Carly, Hesdigneul-lès-Boulogne, Isques, Saint-Léonard, Hesdin-l'Abbé, Condette, Saint-Étienne-au-Mont, and Outreau.
The Liane flows for a length of 36.7 km. It rises at Quesques, then flows through the communes of Bournonville, Wirwignes, Questrecques, Carly, Hesdigneul, Isques and Saint-Léonard. It finally flows into the English channel at Boulogne-sur-Mer. Before being fitted with canals and locks, the Liane estuary contributed directly to the fleuve marin côtier which abuts the Picardy estuaries up to the location of the two capes. It has been proposed in one variation of the project that its estuary, although significantly transformed by technology, should be part of a putative natural park, the Parc naturel marin à l'ouvert des estuaires picards et en mer d'Opale, a proposal in preparation since 2008 and submitted to public enquiry in 2011.

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