(d)"drainage work" includes,-(i)channels, either natural or artificial, for the discharge of waste or surplus water, and all works connected with or auxiliary to such channels;(ii)escape channels from an irrigation work, dams, weirs, embankments, sluices, groynes and other works connected therewith, but does not include works for the removal of sewage;(iii)any work in connection with a system of reclamation made or improved by Government for the purpose of drainage of the country; and(iv)all works for the protection of lands from inundation or erosion, constructed or maintained either wholly or in part by the State Government;
