Side valley

At Rocamadour (Lot, France) the traditional village clings to the slope, leaving the valley floor for agriculture

A side valley and a tributary valley are valleys whose brook or river flows into a greater one.

Upstream, the valleys can be classified in an increasing order which is equivalent to the usual orographic order: the tributaries are ordered from those nearest to the source of the river to those nearest to the mouth of the river. A confluence is where two or more tributaries or rivers flow together.

单词	Side valley
释义	Side valley 英语百科 Side valley A side valley and a tributary valley are valleys whose brook or river flows into a greater one. Upstream, the valleys can be classified in an increasing order which is equivalent to the usual orographic order: the tributaries are ordered from those nearest to the source of the river to those nearest to the mouth of the river. A confluence is where two or more tributaries or rivers flow together.
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