I have created these raster files for a river basin:

Flow Direction
Flow Accumulation

I like to genereate a layer how it is shown in the picture below. enter image description here

I need the values for the distances from each spring to the outlet along the flow path length. By now I used Qgis 2.16.1 with Grass and Saga tools. Moreover I figured out that maybe the r.stream.distance command is what I need, but it isn´t available in the toobox and i couldn´t add it. I am a newcomer and happy about any explanation.

  • It seems a Flow path length map to me. In QGIS processng toolbox; GRASS has r.flow and SAGA has Terrain Analysis - Hydrology | Flow path length – Kazuhito Oct 27 '17 at 12:21

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