[GRASS-user] Itzi: units of length and flooded areas

[Laurent C.]

Hi Rich,

The rainfall unit indeed mm/h. The units used for all entry and output maps
are listed in the user manual on the website. In the tutorial, the example
output map is in meters after 100 minutes of simulation (map #20 with a
record step of 5 minutes). Another way to know a map's time stamp is to use
the GRASS temporal tools.

If you want to represent a blocked watershed, don't set any boundary
condition. By default, they are closed. The water will then not exit the
domain, apart from optional infiltration.

Laurent

El sept. 27, 2016 12:37 PM, "Rich Shepard" <rshepard at appl-ecosys.com>
escribió:

> Laurent,
>
>   I appreciate that Iizi works in SI units and I have a question about the
> basis for that. Specifically, in your tutorial section using mapcalc to
> create a map of uniform rainfall you specify 'rain=100'. Is the 100 in
> mm/hr
> or some other unit or rate?
>
>   Your example figure, nc_itzi_tutorial_h_0020, appears to present water
> depth after 2 hr of 100 mm/hr? rainfall in an unrestricted stream channel.
> Is there a way of showing rainfall accumulation (flooding) if the watershed
> outlet is blocked?
>
> Thanks,
>
> Rich
>
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