[GRASS-user] r.watershed in grass 6.1 and 5.4

[Dylan Beaudette]

Hi,

Have you had a look at r.terraflow. It seems to work much better on large 
grids. I recently put together a small document (still sparse) on a couple 
approaches to whatshed basin delineation here:

http://casoilresource.lawr.ucdavis.edu/drupal/node/284

note this was all done on Linux x86.

Cheers,

Dylan

On Wednesday 16 August 2006 15:01, Hans Hauska wrote:
> Hi,
> I have for a student tried to run r.watershed on a MacBook Pro. The
> command was as follows:
>
> /Applications/Grass/grass54.app/Contents/Resources/grass54/etc/water/
> ram el="dem25upper at kbackavrinning" t=75 ba="kbbasins" ac="kbacc"
>
> SECTION 1a (of 5): Initiating Memory.
>
> SECTION 1b (of 5): Determining Offmap Flow. Percent Complete:
>
> SECTION 2: A * Search.                      Percent complete:
>
> SECTION 3: Accumulating Surface Flow.       Percent complete:
>
> SECTION 4: Watershed determination.
>
> SECTION 5: Closing Maps.
>
> everything seems to work fine, but When it reaches Section 5 then it
> just stands on one point and chews ....
> I had it run for over 12 hours, but nothing happened in the final
> stage and it never finished.
> Has anyone been able to successfully run it?
> Is there a special trick? Should I use a Linux version (that is
> possible)
> I'd appreciate any hints or suggestions on the matter.
> Best regards
> Hans Hauska
>
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-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341