Op 11-12-09 20:44, Joop Goedbloed schreef: > Hi Users on the list > > To trace back the overland flood mechanism in (sub)urban area I've > done some experiments in grass. > (Sub)urban areas has in general a sewer-system (combined or storm). > One of the design-parameters of a sewer is the maximal capacity of > rainfall, in most cases e sewer is design > to carry off about 20mm/h rain. > > In case of very heavy storm about 60 mm/h the sewer becoms full and an > overland flood mechanism come into being. > > I've a 5x5 meter grid DEM of the area. > In grass there are several modules to simulate overland flood. > > * r. terraflow > * r.watershed > * r.topmodel > * r.topidx > ... > > What is the most useful module(s) in grass to simulate overland flood > mechanism? > > > First I used the r.terraflow module the resulting accumulation map is > here: > Terraflow accumulation map <ftp://192.168.2.107/houtblerick/teracc.png> > > Using the r.watershed module resulting streammap is here: > Watershed stream map <ftp://192.168.2.107/houtblerick/wsstream.png> > > In both maps the red boxes are the complaints of water flood > A foto of the real situation is here > Foto <ftp://192.168.2.107/houtblericj/Holleweg.jpg> >
For the puctures try ftp://80.61.251.86/Houtblerick/ there are the tree pictures. > Thanks > > Joop Goedbloed >
_______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
