Check out the mountain in the background. You can count at least six or more beach lines. (Horizontal lines in the side of the mountain caused by wave action. This tells you that the Dead Sea had various periods of depth over time.)
The Salton Sea in Southern California has the similar record carved in the surrounding mountains. Adding water to the Dead Sea has happened many times in the past. This time it will be caused by man and not Mother Nature.
I was thinking more of pressure along a fault, than erosion.