The Deûle is a river located in northern France and southern Belgium. It flows through the region of Hauts-de-France and is a tributary of the Escaut River. The river is approximately 80 kilometers long and plays an important role in local ecosystems and agriculture. Historically, the Deûle has been significant for trade and transportation. It connects various towns and cities, including Lille, which is a major urban center in the region. The river has also been used for navigation, allowing boats to transport goods and people along its course.