From the central major sluice, a 40 feet wide central conveys water to feed thousands of acres of paddy lands and ends at the historical capital Anuradhapura city tank Tissa Wewa meandering over 87 km (54 mi) at a slope of 6 inches per mile and is another wonder of primeval hydraulic engineering facility in ancient Ceylon.

[1] Tamil invaders who arrived from South India ruled the north part of the country during the period from 429 to 455 CE.

[3] King Dhathusena was very keen on information with regard to a spot very suitable to construct a tank to be the massive one in the history of Sri Lanka.

There was a man called Kadawara who left his family and went to live in the jungle due to his wife's unbearable and repeated insults and disrespects towards him.

When the king questioned him of the treasure, Kadawara revealed his true story and told real reason for his leaving the city and living in the jungle.

Kadawa said, "No sir, I have not seen anything interesting but in a brook somewhere in the jungle, water is being blocked by the flora called Kala that has been grown across that stream.

[7] It is used for fresh water fishing and the flora, specially the grasses in its valley, is the main sources of silage for the herds of cattle in the area.