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The lower section, from the embanked waterfront to the boulevards, is the French quarter, once the hub of colonial power.

Historic England's flying archaeologists identified two round houses, separated from the surrounding land by an embanked boundary with an entrance on the southern side, opening towards a stream.

The scheme also involved the huge challenge of embanking the Thames, creating the Victoria, Albert and Chelsea embankments.

In the Ganges Brahmaputra delta in Bangladesh and India, home to 170 million people, the surviving wetlands are up to 1.5 metres above the embanked and reclaimed land.

In addition, various kinds of canals 590 and endiked or embanked lakes had come into existence, forming altogether a vast network of more or less stagnant waters.