[Qgis-user] Sextante tools via Qgis : information regards Watershed analysis

[laurent celati]

Hello,

Thanks for your reply. As you know yesterday i tested Grass via QgisFORQgis.
There was a bog during the process and i had a error message. 

This morning i have tested Grass via Qgis and it's works well. I have 


1/With Grass r.watershed i have to enter this following parameter : "minimum
size of exterior watershed basin" (without unit value). What criteria
determines the value to be enter? How to know this value ? 

In my case, i 'm using SRTM 90m as DEM raster input. 


2/According to you, what is the better tool for between r.watershed or
Taudem "StreamReach and watershed" ?

Thank you in advance. 



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