Source (river or stream)

The source of a river or stream may be a lake, a spring, or a collection of headwaters. Headwaters are small streams that create the river or stream. Also they may be glacial headwaters, waters formed by the melting of the ice of glaciers. The source is the farthest point of the river stream from its estuary or confluence with another river or stream.

Where a river is fed by more than one source, it is usual to regard the highest as its source, the others being considered tributaries. Often, however, the way that rivers and streams are named is not consistent with this convention.

Near its source a river or stream may be quite insignificant and growing as more and more water drains into it.

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