[GRASS-user] upslope contributing areas

[Francesco Mirabella]

Hello,
and thanks for your fast replies,
yes, the final result which I'd like to get is a river profile along 
which the values of the upslope contributing areas can be plotted on a 
separate y axis.
In order to get this I suppose I should be able to "cat 
river_long_profile_ascii | r.profile a_raster_map_containing_the 
upslope_areas" which can provide values in square meters or square km or 
whatever.
Do you know if such a raster map can be obtained from a dem?

Francesco



Rainer M Krug wrote:
> It depends on what the OP was looking for - it sounds to me that he is 
> looking for a kind of "dynamic" approach, where one can determine the 
> upslope drainage area for an arbitrary location. Unfortunately, I don't 
> have a solution, but would be quite interested in the answer.
> 
> Cheers,
> 
> Rainer
> 
> On Thu, Oct 13, 2011 at 8:36 AM, Johannes Radinger <jradinger at gmx.at 
> <mailto:jradinger at gmx.at>> wrote:
> 
>     Hello Francesco,
> 
>     you could use something like the AddOn r.stream.basin
>     (http://grass.osgeo.org/wiki/R.stream.*)
>     to delineate the basins. Every basin gets a unique number.
>     Afterwards you can just query how
>     many cells do have a certain number.
> 
>     best regards!
>     Am 13.10.2011 <tel:13.10.2011> um 08:20 schrieb Francesco Mirabella:
> 
>      > Hi list,
>      > does anyone know if there is a way to compute the upslope
>     drainage contributing areas along a stream?
>      >
>      > thanks for your help!
>      > Francesco
>      >
>      >
>      >
>      >
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> 
> 
> -- 
> Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation 
> Biology, UCT), Dipl. Phys. (Germany)
> 
> Centre of Excellence for Invasion Biology
> Stellenbosch University
> South Africa
> 
> Tel :       +33 - (0)9 53 10 27 44
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