water words: thalweg

Alli Del Gizzi

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In water words we explore the etymology of words we commonly use in the world of water.

Thalweg (n.) the deepest part of a stream channel.

​The thalweg is nearly always the area of a stream with the fastest flow, making it an important location for measurements (flow, temperature, etc.)

Thalweg is a combination of the German words thal (valley) + weg (way) which translates as the "valley way".

Next time you're looking at a stream, see if you can spot the thalweg, it can be right in the middle or against the bank!