[GRASS-user] Question about unidimensional and bidimensional waterflow analysis

[Roberto Marzocchi]

Hi Diego,

I answer also to your question of yesterday about damflood.

- r.inund.fluv use a quasi-2D approach, but is not an hydrodynamic model.
It is only a way to export result of a 1D hydrodynamic model on an high
resolution DEM in order to obtain flooding map.

- r.damflood use a 2D approach even if we have only performed test with
dambreak initial condition and with a landslide generated tsunami. If you
go on the addon page (
http://grasswiki.osgeo.org/wiki/AddOns/GRASS7/raster#r.damflood)  you find
the SWE.c library that solve the shallow water equations in GRASS using a
finite volume method as detailed described in Cannata M. & Marzocchi R.
(2012). Two-dimensional dam break flooding simulation: a GIS embedded
approach. - Natural Hazards 61(3):1143-1159

Finally r.dam is only a grass script which take advantage of r.lake in
order to create a reservoir that is one of the needed inputs of r.damflood
command.


I hope to answer to your questions...for further doubts do not hesitate to
contact me.
Best regards,
Roberto


-- 
Eng. Roberto Marzocchi, PhD
R&D coordinator
Gter srl Innovazione in Geomatica, Gnss e Gis
Spin-off Progetto Uni.T.I. promosso da UniGE
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E-mail: roberto.marzocchi a gter.it
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2013/10/24 Diego Mérida López <dmerida80 a gmail.com>

> Hi to all, Actually I'm working in my final degree project, the project on
> which I work wants to make a comparison study between a study of waterflow
> hazard in a unidimensional and bi-dimensional models.
>
> Can GRASS work in bi-dimensional algorithms (for example r.dam)?
>
> I know that r.inund.fluv works in unidimensional (like Hec-RASS), but i
> don't know if GRASS have algorithms to work in bi-dimensional to calculate
> plains inundation.
>
> Thanks to all.
>
>
>
> --
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