Lake Assad (,
Buhayrat al-Assad) is a
reservoir on the
Euphrates in
Ar-Raqqah Governorate,
Syria. It was created in 1974 when the
Tabqa Dam was closed. Lake Assad is Syria’s largest lake with a maximum capacity of and a maximum surface area of . A vast network of canals uses water from Lake Assad to
irrigate lands on both sides of the Euphrates. In addition, the lake provides drinking water for the city of
Aleppo and supports a fishing industry. The shores of Lake Assad have developed into important ecological zones.