The Arvand Rud is a river located in the southwestern part of Iran, where it forms the border between Iran and Iraq. It is known as the Shatt al-Arab in Arabic and is created by the confluence of the Tigris and Euphrates rivers. The river flows into the Persian Gulf, playing a crucial role in the region's ecology and economy. The Arvand Rud is significant for navigation and trade, serving as a vital waterway for transporting goods. It also supports local agriculture and fishing industries, providing livelihoods for many communities along its banks. The river's rich biodiversity includes various fish species and aquatic plants.