[GRASS-user] Trento3D screenshots redone

[Laurent C.]

2006/5/19, Thomas Adams <Thomas.Adams at noaa.gov>:
>
> Markus,
>
> I understand about the modeling vs r.lake. I guess I just took the
> opportunity to make the GRASS community aware of the modeling
> possibilities and the possible direction we may go in the NWS. I really
> don't know anything about the SWIG interface; can you explain how it
> could be helpful in this application?
>
> Regards,
> Tom
>
> Markus Neteler wrote:
> > Tom,
> >
> > I didn't intend to make some real hydrological modeling. r.lake
> > isn't written for that.
> >
> > In fact, it will be a good idea to connect to external models.
> > E.g. the SWIG interface could be of help here.
> >
> > Markus
> >
> > On Fri, May 19, 2006 at 09:49:41AM -0400, Thomas Adams wrote:
> >
> >> Paulo,
> >>
> >> You're right about the need for modeling. Actually, the modeling would
> >> be done outside of GRASS and then have the appropriate water surface
> >> elevation data imported into GRASS to show the inundated areas. The
> >> hydraulic modeling *could* be done withing GRASS, but a better first
> >> step probably would be to do the modeling outside of GRASS and then
> >> import the data. An additional advantage to this is that there are many
> >> hydraulic models and one may have a preference as to which to use or,
> >> not be restricted to a particular model, thereby retaining more
> flexibility.
> >>
> >> Tom
> >>
> >>
> >> pmarc wrote:
> >>
> >>> 2006/5/19, Thomas Adams <Thomas.Adams at noaa.gov>:
> >>>
> >>>> Hamish & Markus,
> >>>>
> >>>> How did you do the inundation? With r.lake; does this use a level
> >>>> surface? If so, this is not correct for a river, due to the
> downstream
> >>>> slope of the topography and the hydrodynamics of the flow. The
> resulting
> >>>> water surface elevations would be less than a level surface. Channel
> &
> >>>> overbank cross-sections are needed (corresponding to those used in a
> >>>> dynamic flow model) which then need to be intersected with the
> >>>> topography. The US Army Corps of Engineers HEC-RAS & HEC-GeoRAS
> software
> >>>> that is integrated with ArcGIS does this correctly.
> >>>>
> >>> Well, that was just to showcase possibilities and then you come with a
> >>> class on hidrology!!
> >>>
> >>> Thanks!
> >>>
> >>> I think it should be easy to add a slope to that flood surface, but
> >>> that would be still incorrect.
> >>> The solution would be to implement a flood modelling routine, but
> >>> then, this is the beauty of free software! However, with all my
> >>> excitement about all this, I am not the person to implement it... I'm
> >>> still lacking some work on the localization of GRASS....
> >>>
> >>> I think I speak for the whole community when I say we are glad to see
> >>> GRASS being used is such hi-profile tasks.
> >>>
> >> --
> >> Thomas E Adams
> >> National Weather Service
> >> Ohio River Forecast Center
> >> 1901 South State Route 134
> >> Wilmington, OH 45177
> >>
> >> EMAIL:       thomas.adams at noaa.gov
> >>
> >> VOICE:       937-383-0528
> >> FAX: 937-383-0033
> >>
> >
> > _______________________________________________
> > grassuser mailing list
> > grassuser at grass.itc.it
> > http://grass.itc.it/mailman/listinfo/grassuser
> >
>
>
> --
> Thomas E Adams
> National Weather Service
> Ohio River Forecast Center
> 1901 South State Route 134
> Wilmington, OH 45177
>
> EMAIL:  thomas.adams at noaa.gov
>
> VOICE:  937-383-0528
> FAX:    937-383-0033
>
> _______________________________________________
> grassuser mailing list
> grassuser at grass.itc.it
> http://grass.itc.it/mailman/listinfo/grassuser
>


Hello,

I'm very interested by hydraulic modelling in grass. Maybe it's possible to
interface grass with FEQ* ? Or maybe more simple, to export data to the
HEC-RAS GIS format, which is documented.

On the water related modelling subject, an interface / integration with
EPANET / EPASWMM or other floss water distribution network and storm water
modelling software could be wonderfull and really killing features for my
day to day work (I'm working in an engineering office). Unfortunately I
haven't any programming skill to do that sort of work. I'm thinking about
learning C, though.
So it's only a sort of feature request, and if I could help in any manner on
this subject, please ask me.

*
http://il.water.usgs.gov/proj/feq/
http://www.iqdotdt.com/


Laurent
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