Sometimes headwater . the upper tributaries of a river.

What headwaters mean?

Headwaters are the source of a stream or river. They are located at the furthest point from where the water body empties or merges with another.

What does headwater mean in geography?

The place where a river begins is called its source. River sources are also called headwaters. Rivers often get their water from many tributaries, or smaller streams, that join together. The tributary that started the farthest distance from the river's end would be considered the source, or headwaters.