The Lys River Basin is a geographical area in northern France, primarily located in the Hauts-de-France region. It encompasses the watershed of the Lys River, which flows into the Escaut River. The basin is characterized by its flat terrain and agricultural land, supporting various crops and livestock. The Lys River itself is approximately 90 kilometers long and serves as an important waterway for local communities. It plays a role in regional drainage and irrigation, contributing to the area's economy. The basin is also home to diverse ecosystems, providing habitats for various plant and animal species.