its called a coast tidal line.
a tributary
Idkk ansswer it yourselfs! LAZY MUCHH!?
An estuary.
The head source.
A place where a river rises is called the source or headwaters of the river. This is typically the point where the river begins, either from a spring, glacier, or other water source.
It is called a delta. Or an estuary. It is the mouth of the river.
Brazilians call amazon river :river sea
Presumably because when going in they were heading upstream against the current, while on coming out they were moving with the current.
You might be referring to a "delta." The delta is where a river empties into a body of water, typically the ocean or sea. The delta gets its name from the shape created by the branches of the river that spread out in a triangular form where they meet the larger body of water, as the Greek symbol for delta is a triangle. River deltas are notoriously fertile areas as the river's current transports many minerals downstream and deposits them in the soil in the area of the delta, this mineral rich soil is referred to as "silt." The fertility of river deltas made them popular areas for settlement by early civilizations.
What did the Romans call the river thames
The place where the two rivers join to flow together is called a confluence.
the source of the river