The
Sudd ( or ) is a vast
swamp in
South Sudan, formed by the
White Nile's
Baḥr al-Jabal section. The
Arabic word is derived from , meaning "barrier" or "obstruction". The term "the sudd" has come to refer to any large solid floating vegetation island or mat. The area which the swamp covers is one of the world's largest
wetlands and the largest freshwater wetland in the Nile basin.