Hi, On Mon, Aug 28, 2017 at 4:53 PM, Codrina Maria Ilie <codr...@geo-spatial.org> 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], > 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 > > > > > > > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/grass-user _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-user