Thalweg
THALWEG (a German word compounded from Thai, valley, and Weg, way) in physical geography, a term adopted into English usage signifying the line of greatest slope along the bottom of a valley, i.e. a line drawn through the lowest points of a valley in its downward slope. It thus marks the natural direction of a watercourse.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)
