wetting and drying tolerance

[uke]

Hi, i’d like to change default wetting and drying depth tolerance for 2D cells, but cannot find it anywhere. Anyone knows where to find this option?
Thanks

[Jarvus]

I’m not aware that there is wetting and drying depth tolerance. The flow is controlled by the faces. As soon as any water crosses into a cell, I believe that cell is wet until the last drop of water flows out. I think the cells ultimately keep track of volume.

I could see that it would be nice to have a minimum depth before a face allowed flow to cross it. Or alternately, an easy way to make Manning’s N much larger for very small depths.

[uke]

Thanks Jarvus. I agree with you. Still, I think playing with Manning’s isn’t really a good solution to this problem. As for now, based on default plot tolerance set in Ras Mapper options (0.001m) I’d guess this is the default wetting and drying tolerance (which could be fine for rain on grid but not for traditional flood routing).

I’m gonna send this to HEC as a new feature request.

[Author]

Posts