Tigris–Euphrates river system through the central plain and combine at Al-Qurnah to form the Shatt al-Arab and discharge into the Persian Gulf. The region has historical importance as part of the Fertile Crescent region, in which civilization is believed to have first emerged. The ecoregion is characterized by two large rivers, the Tigris and Euphrates. The rivers have several small tributaries which feed into the system from shallow freshwater lakes, swamps, and marshes, all surrounded by desert. The hydrology of these vast marshes is extremely important to the ecology of the entire upper Persian Gulf. Historically, the area is known as Mesopotamia. As
Sharing the water of the Ganges founding leader Sheikh Mujibur Rahman signed the wide-ranging Indo-Bangladeshi Treaty of Friendship, Cooperation and Peace on 19 March 1972; as per the treaty, the two nations established a Joint River Commission to work for the common interests and sharing of water resources, irrigation, floods and cyclones control. The Farakka Barrage is a dam on the Bhagirathi river located in the Indian state of West Bengal, roughly from the border with Bangladesh. India uses it to control the flow of the Ganges river. The dam was built to divert the Ganges River water into the Hooghly River during the dry season,