Why not take the meaning of a 'raft foundation' to its limits and insist that new domestic properties built on a flood plain float with flexible connections to services and suitable restraints to ensure the property settles back afterwards?
No damage, lots more available building space and low lying land that is enhanced in value - no different in principle to the marinas constructed with permanent residential moorings.
If properties are designed correctly, flooding becomes a minor issue. For example the British Waterways Naburn office floods virtually every year, but it uses hard flooring, wiring at high level and is even equipped with slight slopes on all the floors to central drains with one way seals in each room. And there are properties in Yorkshire which also flood virtually every year and have similar systems for keeping vulnerable items above water level, keeping inconvenience to a minimum.
Ken Fowler Ken.Fowler@britishwaterways.co.uk