Thilakarathna, N.D.C.J; Ekanayaka, E.M.M.G.S.K.K; Jayawickrama, G.G.H
(Department of Geography, University of Kelaniya, Sri Lanka., 2020)
Sri Lanka had the most complex irrigation system of the ancient world. Most
of the great reservoir tanks still survive today. Thissa wewa is one of the
unique features of the Anuradhapura district. Mainly it provides ...