I am trying to show the area of flooding that occurs when bodies of water increase by different increments, like 0.5, 1, 1.5 meters, etc.. for all of Tanzania. I have a DEM with all of the bodies of water clipped out and the inverse -the dem of just the bodies of water. My thought is to locate all of the connected pixels to the body of water locations above 0.5, 1, and 1.5 meters (above the particular water source).
I tried experimenting with the cost distance tool in ArcGIS but am not sure if it is the correct tool for the job.
I prefer to use python and/or ArcGIS.
Is there a good way to show what areas would be flooded nearby bodies of water? Is the approach I am considering valid?