It is called the River Confluence. The smaller river being a tributary to the larger river.
Source is the term used for the origins of rivers.source is the starting point of river.it is where the stream or river starts
it is a ravine
confluence
confluence
tributary
its called junction
Junction.
That is a vertex.
A corner
The vertex or apex
One name is obvisously "joint"
It is a derivation of the Native Indian word Tk'emlups, which means "meeting place" because the North Thompson and the South Thompson rivers meet in the dead centre of Kamloops.
The Forks got its name because of the two rivers that cross through Winnipeg. These two rivers are the Red River, and the Assiniboine River. The area where these rivers meet is where The Forks is located, as the rivers “fork” in this location.
an edge or in more simpler term "side"
The Gaelic origin word comrie means a place where rivers meet. This information was found on the online website dictionary Wikipedia. Some also use Comrie as a person's name.
Marketplace
an edge