On Fri, Mar 28, 2014 at 1:03 PM, Thomas Adams <[email protected]> wrote: > All; > > I'm trying to create a water depth map using the following: > > (1) DEM > (2) vector polygon indicating the lateral extent of inundation > (3) stream channel centerline > > I figure I can intersect the polygon with the DEM raster to get the water > surface elevations along the boundary of the extent of flooding. Assuming > that perpendicular to the stream channel centerline, the water surface > should be level, I don't know how to interpolate water surface elevations > across the channel. But, if I can do this, I could, using r.mapcalc, do a > simple subtraction between the water surface elevation raster and the DEM > raster, resulting with a flow depth raster. > > The water surface elevation should, of course, decrease in value in the > downstream direction.
Please take a look at r.carve: http://grass.osgeo.org/grass70/manuals/r.carve.html Markus _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
