Calculate Cold Air Drainage from DEM?

[MatthewPeterson1]

Hi,

I am trying to figure out how to calculate cold air drainage from a DEM.  I need to map areas that have an elevation change of 30m within a 750m radius and am not sure how to do this exactly.

I basically need every cell in the DEM to search a radius 750m to determine if the elevation changes more than 30m.  If it does, then I need it to be reflected in it's attribute table.

Any ideas?

[DarrenWiens2]

I'm not if there's a more direct solution, but you can create minimum and maximum raster (from each cell, the minimum or maximum value within a given neighborhood) using Focal Statistics. Then, you should be able to subtract the original raster from the min and max to find those cells over and under the 30m difference limits.

[MatthewPeterson1]

That's a good idea, just looked at the tool and it sounds like that will accomplish what I need.

Thanks!