and
Picardie The Bresle starts its life at
Abancourt, a commune of the
Oise, at around 200 metres above sea-level and flows northwest over the
plateau of
Formerie, receiving more water from small tributaries along the way (the Ménillet and the Méline). At
Senarpont, it's joined by the Liger, its main tributary. It then takes a turn to the west-northwest, the same direction as most rivers of the
Seine-Maritime and the
Somme. After having received the waters of the
Vimeuse at
Gamaches, the river splits into several branches (the Teinturerie and the Busine) at
Eu and a part is canalised between Eu and Le Tréport. Between these two last places, the Bresle flows into a wide grassy valley one kilometre wide, framed by steep edges and dropping by 100 metres into the wooded dry valleys. This valley shows evidence of the former course of the river when it used to meet the sea at
Mers-les-Bains up until the Middle Ages. The former estuary forms a part of Eu today, in a district known as the "Prairie". In the 12th century, the redirecting of the course of the Bresle, rather than digging a canal, brought its outlet to
Le Tréport. The valley of the Bresle forms the northern part of the
Paris Basin, made up of
chalk of the
Cretaceous period. As it is porous, the basin contains natural
aquifers, very important in maintaining a water supply for both irrigation of crops and drinking water. File:La Bresle canalisée entre Eu et Le Tréport.jpg|The canalised Bresle File:Bresle.jpg|Satellite view of the Bresle File:Bresle Drainage Basin-fr.svg|Map of the Bresle File:La Bresle au centre d'Eu (vue vers l'aval).jpg|The Bresle at Eu File:La Bresle au centre d'Eu (vue vers l'amont).jpg|The Bresle at Eu == Flora and fauna ==