The Tigris is the eastern member of the two great rivers that define Mesopotamia, the other being the Euphrates. The river flows south from the mountains of southeastern Turkey through Iraq and empties itself into the Persian Gulf. read more
Tigris-Euphrates river system, great river system of southwestern Asia. It comprises the Tigris and Euphrates rivers, which follow roughly parallel courses through the heart of the Middle East. The lower portion of the region that they define, known as Mesopotamia (Greek: “Land Between the Rivers”), was one of the cradles of civilization. read more
Iraq: The Tigris-Euphrates river system Iraq is drained by the Tigris-Euphrates river system, although less than half of the Tigris-Euphrates basin lies in the country. Both rivers rise in the Armenian highlands of Turkey, where they are fed by melting winter snow. read more
The Tigris is the second largest river in Western Asia, next to the Euphrates, and it originates near Lake Hazar in eastern Turkey, at an elevation of 1,150 meters (3,770 feet). The Tigris is fed from snow which falls annually over the uplands of northern and eastern Turkey, Iraq, and Iran. read more