the longitudinal outline of a riverbed from source to mouth
2.
the line of steepest descent from any point on the land surface
Word origin
C19: from German, from Thal valley + Weg way, path
thalweg in American English
(ˈtɑːlveɡ, -veik)
noun
1.
a line, as drawn on a map, connecting the lowest points of a valley
2. chiefly International Law
the middle of the main navigable channel of a waterway that serves as a boundary line between states
Word origin
[1860–65; ‹ G, equiv. to Thal, now obs. sp. of Tal valley (c. dale) + Wegway1]This word is first recorded in the period 1860–65. Other words that entered Englishat around the same time include: blind spot, institutionalism, metric system, monism, prep
Examples of 'thalweg' in a sentence
thalweg
We present preliminary results comparing the thalweg network and the drainage network.
E. Guilbert, S. Jutras, T. Badard 2018, 'THALWEG DETECTION FOR RIVER NETWORK CARTOGRAPHY IN FOREST FROM HIGH-RESOLUTION LIDARDATA', The International Archives of the Photogrammetry, Remote Sensing and Spatial InformationScienceshttps://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-4/241/2018/isprs-archives-XLII-4-241-2018.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Based on the fused image in combination with gully thalweg thresholding vectors, the gully thalweg thresholding vectors were amended.
Fuhong He, Tao Wang, Lijuan Gu, Tao Li, Weiguo Jiang, Hongbo Shao 2014, 'An Integrated Use of Topography with RSI in Gully Mapping, Shandong Peninsula, China',The Scientific World Journalhttp://dx.doi.org/10.1155/2014/827124. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Finally, the thick path was reduced to its main course and vectorised to obtain a thalweg network.
N. Thommeret, J. S. Bailly, C. Puech 2010, 'Extraction of thalweg networks from DTMs: application to badlands', Hydrology and Earth System Scienceshttp://www.hydrol-earth-syst-sci.net/14/1527/2010/hess-14-1527-2010.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The changes in mean depth and thalweg depth were studied in detail comparing three reaches of the studied section.
Amissah Gabriel Jonathan, Kiss Timea, Fiala Károly 2017, 'Centurial Changes in the Depth Conditions of a Regulated River: Case Study of theLower Tisza River, Hungary', Journal of Environmental Geographyhttp://www.degruyter.com/view/j/jengeo.2017.10.issue-1-2/jengeo-2017-0005/jengeo-2017-0005.xml?format=INT. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)