Complete Updated Workflow Stream and Catchment Delineation in QGIS

This video shows how to derive streams and catchments from SRTM DEM tiles from scratch in QGIS 3.16 LTR. The workflow uses different plugins: QuickMapServices, SRTM-Downloader, PCRaster Tools and GRASS tools. A complete tutorial can be found at GIS OpenCourseWare: https://courses.gisopencourseware.org/mod/book/view.php?id=818 Note that the procedure uses the PCRaster Tools plugin. You need to install PCRaster prior to using the plugin. Here's the link to the documentation: https://jvdkwast.github.io/qgis-processing-pcraster/ 0:00 Introduction 0:20 Define study area extent 3:04 Download SRTM tiles 4:30 Mosaic SRTM tiles 5:24 Reproject and subset DEM 7:04 Style the DEM 8:37 Convert DEM to PCRaster format 9:26 Fill sinks and calculate flow direction 10:40 Style flow direction with directional ramp 15:50 Calculate Strahler orders 16:50 Calibrate Strahler orders 19:29 Derive channel network 23:25 Style channels with Strahler orders 25:52 Smooth channel network 27:13 Define outlet of catchment 29:02 Derive catchment of outlet 29:37 Polygonize catchment 31:00 Style catchment boundary polygon with inverted polygon shapeburst fill 33:10 Clip channels with catchment boundary 33:54 Store results and project in a GeoPackage #QGIS #QGISHydro #GISOCW