Before revision: upright=1.3|The thalweg of a river In geography and fluvial geomorphology, a thalweg or talweg () is the line of lowest elevation within a valley or watercourse.
After revision: upright=1.3|The thalweg of a river In geography, hydrography,or curve and fluvial geomorphology, a thalweg or talweg () is the line of lowest elevation within a valley or watercourse.