Smooth Stream Networks Derived from DEMs in QGIS 

Stream networks derived using stream and catchment delineation procedures in QGIS can be improved by smoothing. This video shows how to this on-the-fly using a geometry generator expression. Next, you'll see how to export the result to a new vector layer using the Export by expression tool from the Processing Toolbox.
QGIS version: 3.32 Lima, should also work with 3.28
Plugins: PCRaster Tools plugin, OpenTopography DEM Downloader plugin
Open data: (c) OpenStreetMap Contributors, SRTM
Stream and Catchment Delination tool via Resource Sharing plugin with repository github.com/jvdkwast/qgisrepos...
0:00 Introduction
0.26 Using the Stream and Catchment Delineation Processing Tool
2:19 Styling rivers with the Interpolate Line renderer
3:06 Smooth rivers with a geometry generator expression
5:04 Store a geometry generator expression result in a new vector layer (geometry by expression tool)
#QGIS #QGISHydro #PCRaster