Era : Anuradhapura,
Built : King Dhathusena,
Yoda Ela (Giant Canal) or Jaya Ganga, an 87 km (54 mi) long single banking water canal carrying excess water from Kala Wewa reservoir to Thissa Wewa reservoir in Anuradhapura. The Yodha Ela is known for achieving a rather low gradient for its time. The gradient is about 10 centimetres per kilometre or 6 inches per mile
Era : Anuradhapura,
Built : King Dhathusena,