It usually refers to the point where a tributary joins a more major river, or where two or more meet to form a new starting point with a new name.
The River Thames has multiple confluences. One such is the confluence of the River Thames and the River Darent at Dartford.
A river
A portion of the Gulf Intracoastal Waterway is a confluence of the Mississippi River.
Yamuna River
Confluence.
A confluence
confluence
It Joins at a confluence. That is where the river joins the larger one.
A small portion of the Gulf Intracoastal Waterway is the nearest confluence of the Mississippi river.
no where
confluence
It is called the River Confluence. The smaller river being a tributary to the larger river.