Sea Level Rise

Raise the water level to see which low areas connect to the sea. This demonstration uses a fictional coastline.

Water level above the example baseline

1.0 m

Illustrative coastal grid. Cell values are elevations in metres.
Sea	0.5Connected	1Connected	3Above water	4Above water	4Above water
Sea	0.5Connected	1Connected	2Above water	0.5Isolated	3Above water
Sea	1Connected	1.5Above water	2Above water	0.5Isolated	3Above water
Sea	1.5Above water	2.5Above water	3Above water	3Above water	4Above water

5 land cells connected to the sea.

Model and limitations

Model coastal-grid-v1. Water can move between cells sharing an edge when both are at or below the selected level. The sea starts at the left edge.

The example excludes tides, drainage, storm surge and real flood defences. For mapped coastal areas in the United States, see the NOAA Sea Level Rise Viewer.