I would like to use a DEM to extract the thalweg line from a river. I have bathymetric data of the Saguenay River.
As a final product I need my thalweg line as polyline. I'm using both ArcGIS 10.6 and ArcGIS Pro.
I tried it using this workflow and as final product I'm getting a line, but I am not sure that it's a thalweg line.
- Fill tool (input is my bathymetric DEM)
- Flow Direction tool
- Flow accumulation
- Raster to polyline