How the Dutch fight water
The so called Delta Works protect the Netherlands in periods of extreme high tide or heavy gales, like today (9 to 10 Bft at the coast provinces), although these measures of lowering the barriers are not imminent today.
These Delta Works are a direct result of the extreme floods of the coastal provinces at 1st February 1953. In the night from 31st January to 1st February there was a spring tide.
When do spring tides occur?
Spring tides occur twice each month all year long. Interestingly, when there is a full or new moon – the average tidal ranges are larger.
Why do spring tides happen?
When there is a new and full moon, the gravitational pull of the sun is supplemented to the gravitational pull of the moon on Earth. The result of this is that the oceans swell even more than usual.
1st February 1953 – The disaster
How to fight back (animation – English)
The result: by 120kph