What is the term for the point where two tributaries come together?

The term for the point where two tributaries come together is known as a confluence. This geographical feature is significant as it indicates the point of union where the waters from different streams merge into a larger body of water, often leading to enhanced flow and volume of the river system downstream. The concept of confluence is crucial in understanding river systems and hydrology, as it plays a pivotal role in the ecology, sediment transport, and hydrodynamics of the rivers involved.

Convergence generally refers to the act of coming together, but it is not specifically used to describe the joining of rivers. Divergence describes a situation where two rivers or streams separate from each other, which is the opposite of what occurs in a confluence. An estuary is an area where freshwater from rivers meets and mixes with saltwater from the ocean, which is a different geographic feature and pertains to coastal environments rather than the intersection of tributaries.