The evolution of the ancient irrigation system began thus giving way to the birth of a civilisation. The pioneer Hydraulic Engineer, King Pandukabhaya (474-407BC) who may have taken up the cue from small tank-builders, built the first massive tank — Abhaya, as early as the 5th Century BC on the right bank of the Malvatu oya. Devanampiyatissa (307-267BC) built the second tank, Tisawewa, further up, on the right bank of the Malvatu oya in Anuradhapura—which reflects the increased demand that arose for more water from a fast growing population around Anuradhapura. |