Kala Wewa is a large reservoir located in the eye of the Avukana Buddha Statue in the Anuradhapura District of the North Central Province. The Mahavamsa states that King Dhatusena who ruled during the period 455-473 built 18 tanks. Kala Wewa is a creation made by King Dhatusena across the Gona River or Kala Oya.
The water capacity of this reservoir built by King Dhatusena is about one hundred thousand acre feet. That is, about 123 million cubic meters. Also the size of the lake is six thousand three hundred and eighty acres. Kala Wewa consists of six sluices and this reservoir supplies water to about 62829 acres of paddy lands.
King Dhatusena built a giant canal to carry the water flowing from Kala Wewa to Tissawewa and it is also known as Jayaganga. At 54 miles [40 km] long and 40 feet [40 m] wide, the gorge is about 17 miles [1 km] in diameter. We had such advanced technology in ancient times.
If you come close to Kala Wewa you can also travel to the following places.
- Kalawapi Viharaya or Kala Wewa Viharaya. (Now known as Avukana Vihara)
- Dhatusena Rajamaha Viharaya
- Vijithapura Viharaya (considered as a temple built at the place where the last battle between King Gemunu and King Elara is said to have taken place)
- Kadawara Devalaya
- Kala Wewa National Park