Channel
суваг
канал
An open conduit either naturally or artificially created which periodically, or continuously contains moving water, or forms a connecting link between two bodies of water. River, creek, run, branch, anabranch, and tributary are some of the terms used to describe natural channels.
Source http://www.nws.noaa.gov/om/hod/SHManual/SHMan014_glossary.htmЗураг