The Great Zab River is a significant waterway in the Middle East, flowing through northern Iraq and Turkey. It is approximately 400 kilometers long and is a tributary of the Tigris River. The river plays a crucial role in the region's agriculture and provides water for irrigation. The Great Zab River originates in the Zagros Mountains of Turkey and travels southward, eventually joining the Tigris near the city of Mosul. Its basin supports diverse ecosystems and is home to various wildlife species. The river is also important for local communities, providing resources for fishing and recreation.