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?
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.
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?
The rainfall unit indeed mm/h. The units used for all entry and output maps
are listed in the user manual on the website.
Laurent,
Now I see them. I had not scrolled past the example before now. And I see
now that I need to back up and create a new location that has units in
meters rather than international feet, then re-project the LiDAR source data
to the new location. And I thought I was close to being finished. Silly me.
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.
