I have used the automated r.watershed tool in QGIS 2.18 (GRASS plugin) to conduct a watershed analysis (basin boundaries, flow direction, flow accumulation etc).
I'm stuck on the following operations:
1. Visualising flow direction arrows. I tried to convert the flow direction raster to a vector point file using GRASS>r.to-vect, but it keeps crashing (not responding/no error message). Please can anyone recommend a workflow for this (converting the file + visualising arrows)?
2. Burning stream network into the DEM. I created a polyline file from the flow accumulation raster, to join up 'missing' channels. After converting the polyline to a raster, the new raster has a smaller extent than the original DEM. Thus, the SAGA>Hydrology>'Burn stream network into DEM' tool won't operate with rasters of different extents.