[GRASS-user] Problem in running r.sim.water

[Markus Neteler]

On Wed, Jun 10, 2015 at 11:21 AM, vishal tiwari <hi.vishal123 at gmail.com>
wrote:

> Hi all,
>
> I am trying to run the r.sim.water in GRASS. I have calculated the
> partial derivatives dx and dy rater map using r.slope.aspect. I am using
> this elevation map [1] to get the time-series depth map. But I think the
> output file is not being saved in the "outputDepth" rater map (says failed
> to open, on seeing the metadata).
>
> > r.sim.water -t elevin=testElevationLive at sampleMapSet
> dxin=dx at sampleMapSet dyin=dy at sampleMapSet rain_val=150 manin_val=0.015
> depth=outputDepth nwalk=50000 outiter=20
>
> STDOUT:
>
> Min elevation   = 43.00 m
> Max elevation   = 103.00 m
> Mean Source Rate (rainf. excess or sediment)    = 0.000030 m/s or kg/m2s
> Mean flow velocity  = 21.486384 m/s
> Mean Mannings   = 0.015121
> Number of iterations    = 647482826 cells
> Time step   = 0.00 s
>
> and on the command console:
>
> Command 'd.rast map=outputDepth at sampleMapSet' failed
> Details: Raster map <outputDepth at sampleMapSet> not found
>
> [1] https://www.dropbox.com/s/ooxcj0y6v2kzeml/testElevationLive.tif?dl=0
>
> Thanks and Regards,
>


For the list archive record, the offlist answer by Helena Mitasova:

On Fri, Jun 12, 2015 at 10:52 PM, Helena Mitasova wrote:
> It is possible that there is no output - with time step smaller than
0.001 it looks like you are running it at very high resolution
> on a huge DEM for some extreme storm event (150mm/hour - is that what you
are trying to model?)
> or you just don’t have your region set properly. To test, try to increase
the grid cell size and use 50mm/hr storm.
>
> Helena
>


Markus
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