[Qgis-user] DTM/DEM - upstream delineation

[chris hermansen]

Tony and list,

On Thu, Apr 16, 2026, 14:49 Tony Shepherd via QGIS-User <
qgis-user at lists.osgeo.org> wrote:

> Hi All
>
>
>
> Just a question to see how others are achieving this.  I often get asked
> to measure the area of a catchment, upstream of a particular point.  With a
> DTM/DEM I would have thought that there should be a simple tool to do this
> - click a point, and then shade or draw me a polygon of everything upstream
> of that point.  Sounds easy, but achieving this isn’t so simple, or maybe I
> am missing an easy-to-use tool or plug-in?
>
>
>

Have you reviewed this documentation on the topic?

https://docs.qgis.org/3.44/en/docs/training_manual/processing/hydro.html

>
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