[GRASS-user] Flow line [r.flow]

[Valter Albino]

Hi,

It's done, running from GRASS GIS 7.8.2 GUI, in a Windows 64bits OS.
There ares differences when simulating for small areas or bigger areas,
with default options.
When testing for bigger areas I wasn't setting the number of cells bettween
flowlines & maximum number of segments per flowline.
Thanks

Cumprimentos,
*Valter Albino -* Geógrafo Físico, M.Sc.
Modelação H&H / Riscos ambientais / OT&U
www.valteralbino.wixsite.com/hydrodynamics


Valter Albino <valteralbino  gmail.com> escreveu no dia quinta, 30/01/2020
à(s) 09:55:

> Hi Huidae
> Yes, the purple and black lines flow lines. Wondering if using units in
> "cm", instead of "m" gives correct results (the online manual sais that, i
> suppose) in terms of: more number and length of flow lines.
> Using r.flow (https://grass.osgeo.org/grass78/manuals/r.flow.html) with
> the following raster file:
> [image: image.png]
> Sorry to moderator (sent 2 files with extra weight)
>
> Cumprimentos,
> *Valter Albino -* Geógrafo Físico, M.Sc.
> Modelação H&H / Riscos ambientais / OT&U
> www.valteralbino.wixsite.com/hydrodynamics
>
>
> Huidae Cho <grass4u  gmail.com> escreveu no dia terça, 28/01/2020 à(s)
> 02:56:
>
>> Valter,
>>
>> Which module did you use to generate flow lines? It wouldn't be easy to
>> troubleshoot your problem without sample data and detail steps. Are those
>> purple and black lines flow lines?
>>
>> Best,
>> Huidae
>>
>>
>>
>> On Wed, Jan 15, 2020 at 3:58 PM Valter Albino <valteralbino  gmail.com>
>> wrote:
>>
>>> Is it normal results, scattered flow lines in a landscape with
>>> altimetric amplitude of 50 to 60 meters (see following image). Is it an
>>> erratic result?
>>>
>>>
>>> [image: imagem.gif]
>>>
>>> Cumprimentos,
>>> *Valter Albino -* Geógrafo Físico, M.Sc.
>>> Modelação H&H / Riscos ambientais / OT&U
>>> www.valteralbino.wixsite.com/hydrodynamics
>>> _______________________________________________
>>> grass-user mailing list
>>> grass-user  lists.osgeo.org
>>> https://lists.osgeo.org/mailman/listinfo/grass-user
>>
>>
>>
>> --
>> Huidae Cho, Ph.D., GISP
>> GRASS GIS Developer
>> https://idea.isnew.info
>>
>
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