Calculating Flooded area / Inundation in ArcGIS

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I was tasked to create a layer with the flooded areas if the sea / river level was to go up by X feet. There is no requirement to take Flow and Pour Points into account, just a simple raise in water level.I will be using ArcGIS and have access to all extensions. As an input I have a DTM (tiff) and coastline (shp) layers.I have found this very helpful video as a reference, which outlines the following process:

1. Calculate
2. Reclassify to have only a single value
3. Convert to vector
4. Remove polygons that are not touching the coastline (select by location)

Before creating a model from it, I thought there might be a dedicated tool for that, either in the Hydrology toolbox in the Spatial Analyst extension, in the ArcHydro toolboxes or in the Government toolbox.

Is it indeed the case? Which tool would be the best for that?



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