[Qgis-user] What is the best way to do a simple watershed analysis on a raster grid?

[kimaidou]

Thanks a lot for the kind anwsers. I will try these tutorials !

Cheers
Michael


2013/11/27 Lene Fischer <lfi at ign.ku.dk>

>  Hi Michael,
> Try this cookbook
> http://qgissextante.blogspot.dk/2013/01/hydrology-analysis-with-taudem.html
>
>  Regards
> Lene Fischer
>  ------------------------------
> *From:* qgis-user-bounces at lists.osgeo.org [
> qgis-user-bounces at lists.osgeo.org] on behalf of kimaidou [
> kimaidou at gmail.com]
> *Sent:* 26 November 2013 20:43
> *To:* Alexander Bruy
> *Cc:* qgis-user
> *Subject:* Re: [Qgis-user] What is the best way to do a simple watershed
> analysis on a raster grid?
>
>     Hi
>
>  I already tried the saga and grass tools via Processing framework. They
> are really powerfull, but also really complicated in my opinion. Hard to
> find the correct algo, the correct treshold, necessity to manually
> vectorize the produced watershed raster (I have surely missed something
> here...), etc.
>  I am surely not an hydrology expert, but I am convinced that we could
> create a full processing model wich let humble users do the job.
>  Any pointers to documentation or examples would be apreciated if anyone
> know some (I searched "grass catchment basin" or other keywords and could
> not find a step by step procedure adapted to "beginners")
>
>  Michael
>
>
> 2013/11/25 Alexander Bruy <alexander.bruy at gmail.com>
>
>> Hi Rob,
>>
>> you can try to do this with Processing framework. There is
>> at least three different providers that have watershed analysis
>> tools: GRASS, SAGA and TauDEM
>>
>> 2013/11/24 Rob Stewart <rstewart at hydrologyandwater.com.au>:
>>  > Hi,
>> > What's the best way to do a simple watershed analysis on a raster grid?
>>  I'm
>> > wanting to generate rainfall/runoff sub-catchment polygons.
>> > Rob
>> >
>> >
>>  > _______________________________________________
>> > Qgis-user mailing list
>> > Qgis-user at lists.osgeo.org
>> > http://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>>
>>
>> --
>> Alexander Bruy
>> _______________________________________________
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>>
>
>
>
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