Rotterdam surge barrier protects the port from extreme events

For coastal settlements, storm surge is often the most damaging element of a large storm. The Maelsant surge barrier protects Rotterdam from seas rising up to three metres above normal levels, a 1-in-10,000 year event. Dutch engineers emphasise that although their combination of sea walls, dikes and sand engines are enough to protect the coast from projected surges at the moment, they regularly evaluate their systems to ensure they are robust.