Hi Maxi,
Yes, it is used and works well :)
You remember correctly, that was what I used.
Thank you and your colleague for the fine work at r.damflood.
Cheers,
Codrina
On 30/08/2017 11:56, Massimiliano Cannata wrote:
Hi, glad to see the module is used :-D
If I correctly remember, you have to use a DEM with bathimetry and dam,
then the dam break is passed trough a raster with decrements of dam
height (it is use to calculate the new DEM after the dam breck by DEM -
BREAK).
Best,
Maxi
2017-08-30 10:44 GMT+02:00 Codrina Maria Ilie <[email protected]
<mailto:[email protected]>>:
Hi Anna,
You were perfectly right!
I changed from null to 0 and it works.
Thank you!
Codrina
On 29/08/2017 00:05, Anna Petrášová wrote:
Hi,
On Mon, Aug 28, 2017 at 4:53 PM, Codrina Maria Ilie
<[email protected] <mailto:[email protected]>> wrote:
Hi all,
I have been trying to run GRASS7 module r.damflood using the
following
datasets:
[https://drive.google.com/drive/folders/0B2Yx_1shUSx3VThlY3BrV1JyWjg?usp=sharing
<https://drive.google.com/drive/folders/0B2Yx_1shUSx3VThlY3BrV1JyWjg?usp=sharing>],
with this command:
r.damflood --overwrite --verbose elev=dem lake=water_depth
dambreak=dam_breach manning=manning tstop=3 deltat=1
h=b_depth vel=b_vel
hmax=b_mwd vmax=b_mwv imax=b_mi wavefront=b_wf
To make it easier, the lake has a constant depth.
As far as I can understand, the rasters should be correctly
built, but the
outputs of r.damflood are obviously wrong (rasters with
nodata or one
category = 0; at second 1 the depth raster is half the
lake's size (s00.png,
s01.png)and at second 2, it completely disappears).
During the processing, I get the Courant-Friedrich-Lewy
stability condition
warning message.
If I try to chose as computational method for initial
velocity estimation,
uniform drop in of lake or small dam breach, I get the
following error
"ERROR: Don't find the dambreak - Please select a correct
map or adjust the
computational region".
Does anyone have an idea what could be the reason of these
results, please?
Any suggestion would be highly appreciated.
Your water_depth should have 0 instead of nulls, I think that's the
problem in your case. The stability condition warning probably means
you should reduce your time step, on the other hand, it will
take more
time.
Anna
Cheers,
Codrina
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--
*Massimiliano Cannata*
Professore SUPSI in ingegneria Geomatica
Responsabile settore Geomatica
Istituto scienze della Terra
Dipartimento ambiente costruzione e design
Scuola universitaria professionale della Svizzera italiana
Campus Trevano, CH - 6952 Canobbio
Tel. +41 (0)58 666 62 14____
Fax +41 (0)58 666 62 09____
[email protected] <mailto:[email protected]>
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