[GRASS-user] r.basins.fill usage

Achim Kisseler ak7 at jupiter.uni-freiburg.de
Thu Oct 15 09:27:02 EDT 2009


I'm not sure if I understood you right:

the border of a watershed is unique, if you see the basin starting from
outlet of a river into the ocean.

But there are unlimited subbasins (up to the resolution of the raster)!

So you have to define a characteristic for the watersheds, eg. a basin
size from the threshold of r.watershed.

Greets,
Achim

M S schrieb:
> Upon first glance, r.basins.fill seems like a great tool to generate
> subbasins within a watershed.  Although I must not be understanding
> something obvious and essential.
> 
> If one has to digitize in the internal ridges in a given watershed,
> why run the ridge input through the module if one has essentially just
> delineated the subbasins ridges?
> 
> Is there an advantage to using a smaller threshold on r.watershed to
> get smaller basin delineations (ceasing when thin strip basins get
> introduced)?
> 
> Thanks for any feedback,
> Mark
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