|Capital||Sri Jayawardenepura Kotte|
|Population||Approximately 21 million|
Yoda Wewa is said to have built by king Datusena (459-477) by damming and diverting water from the Malwatu Lake. Spreading over 4550 hectares, the tank is fed by an 8 mile (13 km) ancient canal, which carries water from the Malwatu Oya River.
Situated approximately 25km southeast Mannar, Yoda Wewa feeds 162 small streams downstream and irrigates about 11,000 hectares of paddy land.