I have a DEM map in my project Tsunami Assesment project.The white area below the mentioned map is sea and we know that possible tsunami height is 14 meters(please neglect the line, there is an error in the data).So i have divided my DEM into 2 zones: the areas which have height of 14+ meters (in pink) and the ones below it (inundation zones-in blue).
How do I calculate how many m^2 is inundated (below 14 meters) and what percent of study area does it cover?