The Deûle (Dutch: Deule) is a river of northern France which is channeled for the main part of its course (from Lens to Lille). The upstream part is still partly free-flowing and is known as the Souchez. The Deûle flows into the Lys (right bank) in Deûlémont. The Souchez is formed from the union, in the village of Souchez, of two smaller brooks, called the Carency and the Saint-Nazaire. The channeled part comprises two branches: Immediately downstream of Lens, the channel is unusually elevated compared to the neighboring banks, as a result of . The Deûle does not yet profit from a .