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.
The place where the river begins is called a source.
a source is a place where a river begins
a source is a place where a river begins
a source
a tributary
epicenter
An estuary.
The headwaters.
A river that begins with I is the Illinois River in Illinois USA.
The Indus River is the major river of Pakistan that begins with an I.
A river's place of origin is where the river begins; this is called the source. The opposite of the river's source is the mouth, or where the river ends. The mouth of the river is where the river meets the ocean.