Search for "Kosi_River" on Wikipedia, Wikimedia Commons, Wiktionary, Wikiquote, Wikibooks, Wikia, Wikitravel, Google (excludes "Wikipedia", adds "water"), Yahoo (excludes "Wikipedia", adds "water"). An alternative spelling for the Koshi River, a tributary of the Ganges which flows south from Nepal into Bihar. It is prone to flooding and shifting its course during monsoons. There was a major flood resulting in a major shift in the course of the river in 2008.