Durdent (river) Durdent (river) The river Durdent is one of the many small coastal rivers that flow from the plateau of the Pays de Caux into the English Channel. The river rises just northwest of Yvetot, near Héricourt-en-Caux, at the meeting of the two streams, the Saint-Denis and the Saint-Riquier, then takes a north-northwest route, typical of the rivers of the Seine-Maritime department. It passes through the villages of Robertot, Sommesnil, Oherville, Le Hanouard, Clasville, Grainville-la-Teinturière, Cany-Barville, Vittefleur and Paluel and empties into the English Channel at Veulettes-sur-Mer. In earlier times, it powered many watermills along its course. The Durdent valley is
Almada River of Castelo Novo, Sambaituba and Aritaguá. From Aritaguá the river flows south parallel to the sea shore past Iguape, and empties into the Atlantic Ocean near the town of Ilhéus. The Almada River supplies water to the towns of Itajuípe and Coaraci. It supplies about 70% of the water used by residents of Itabuna. In the summer of 2015–16 water rationing was imposed due to low levels in the river, which had dried up in some sections. As of 2010 half the domestic sewage from Aritaguá was released directly into the river, while 25% went into pits in backyards, and