Section 2(9) in The Goa Command Area Development Act, 1997
(9)"drainage system" includes:-(a)channels, either natural or artificial for the discharge of waste or surplus water and all works connected therewith or ancilliary thereto;(b)escape channels from an irrigation or distribution system and other works connected therewith but does not include works for removal of sewage;(c)all connecting drains and main drains to drain off surplus water from field drains;(d)all field drains and related structures under pipe outlet;
