The Somme Canal, a departmental public domain, has been a victim of the proliferation of the invasive exotic species “heterophyll myriophyll” since 2014. The heterophyll Myriophyll grows very rapidly, allowing it to eliminate other native aquatic species. When the plant forms a dense population, it covers the entire waterway. In 2018, new mechanical grubbing-up and spawning work on seventeen beefs was undertaken to limit the development and proliferation of this plant and to preserve the biodiversity of these sites. The beefs concerned are upper Friesland, Lower Friesland, Cappy, Froissy, Méricourt, Corbie, Daours, Lamotte-Brebière, Amiens,Montières, Ailly sur Somme, Picquigny, la Breilloire, Long, Pont-Remy, Abbeville.