Interpretation:
The above map shows that there is much greater shoaling along the south coast, making this coast more vulnerable to destructive tsunamis. On average, in the tsunami danger areas along the south coast, the 30 m contour line is about 3 km inland. This means that in the event of a tsunami hitting the South coast the danger zones are doubly vulnerable because: one, the wave can build up to a great height due to the wide shoaling stretch, and two the swash of the breaking wave will enter far inland as a result of the flat topography. It is the swash followed by the backwash that then causes death and destruction when everything in its path is dragged back out into the sea.
According to the map above the entire coastline of Viqueque District is vulnerable to potentially destructive tsunamis because of the relatively wide shoaling stretch in combination with a flat topography inland from the coast.