Section 2(1)(c) in Karnataka Irrigation (Levy of Betterment Contribution and Water Rate) Act, 1957
(c)'drainage work' includes,-(i)channels, whether natural or artificial, for the discharge of waste or surplus water and all works connected with and auxiliary to such channels;(ii)the escape channels from an irrigation work;(iii)dams, weirs, embankments, sluices and groynes;(iv)all works for the protection of lands from floods or from erosion, which are owned or controlled by the Government, but does not include works for the removal of sewage;