гол суваг
магистральный канал
A WATERWAY used to divert water from its natural course. The term is generally applied to a temporary arrangement e.g. to by-pass water round a DAM site during construction.
Source http://www.kennisbank-waterbouw.nl/Glossary/printUK.php?subject=@тойруулан зайлуулах суваг
обводной канал
Channel built to divert flows from a point upstream of a region to a point downstream.
Source EcoLexiconЦогцолбор барих үед.