Some of the 130 rivers that flow into the Caspian Sea are the Volga River, Ural River, Kura River and Terek River. The Volga River is the largest river to flow into the Caspian Sea, flowing into the northern coast of the sea, followed by the Ural River located to its east. The Kura River enters the Caspian Sea from the west, as it travels from Turkey to Azerbaijan.
The Samur River flows into the Caspian Sea through Azerbaijan, while the Sulak River and Terek River flow into the sea from Georgia, where they travel to from Russia. The Kuma River flows into the Caspian Sea from Russia. The Volga River is responsible for about 80 percent of the flow into the Caspian Sea, aided by its many tributaries, including the Samara, Chapayevka, Sok, Aktay, Yeruslan, Tereshka, Tsivil, Rutka, Nara, Protva and Ugra. About 10 percent of the remaining water is supplied by the Kura, Terek, Ural and Surak Rivers. All of these rivers flow into the Caspian Sea from either then north or the west. In the past, the Amu Darya river flowed into the Caspian Sea via the Uzboy River and the Syr Darya, before reversing its flow in the 16th century. The Caspian Sea is the largest enclosed body of water in the world.