I am working on a Breach Analysis and need to create an inundation map. The breach releases into a much larger river floodplain. The inundation map needs to outline the area that will be flooded up to the point where the breach wave intersects with the 100 year flood elevation. In other words, I need to map the point where the two elevations meet. I am trying to show the difference in depth between two results but can figure out how. I think that would give me the limits I am looking for. Does anyone have ideas or ran into this before?
The inundation area is considered the point at which the breach wave intersects with the 100-year flood elevation. This is not necessarily the edge of the floodplain because the breach wave could be a couple feet higher than the 100-year flood elevation. Thanks for you reply though.