groundwater is the main water resource in Oman used for domestic, industrial and agricultural purposes.

The Zayandehroud, which means ‘life-giving river’, is the largest river in central Iran and has traditionally been a major source of water for the country

The Iraqi Marshes are located in the lower Mesopotamian basin, in the vast floodplain wetlands created by the Tigris-Euphrates river system.

For many years, negotiations between Turkey and Syria over the Orontes or Asi River were linked to issues concerning the Euphrates and Tigris rivers shared between Turkey, Syria and Iraq, and progress of the former was dependent on progress of the latter