The start of a river is called a source.
The start of a river is called the headwaters or source; the end of a river is called the mouth.When a river flows into another river, the 'mouth' of the river is called the confluence.
The source
The start of a river is known as it's source.
It's called a headwater.
The starting point of a river is called a source. A smaller river that flows into a larger river is a tributary.
The start of a river is called the "source" or "headwaters". The end of the river is called the "mouth" or "outlet".
The mouth of the river is NOT called the start. The mouth is the end of a river. The headwaters refers to the starting point(s). The starting point is called the source.
The start of a river is called the source or the head.
in a city called Al-Morogran
at the start of the river Avon is the start of the river.
there is a river in toronto canada called the humber, i know it ends in lake ontario but where does it start ?