4 ms·

Why, nothing happened. Let nature run it course. After the tide the water will flow back, and the 32 cm rise is nothing to worry about (after 4 hours, imagine t

Why, nothing happened. Let nature run it course. After the tide the water will flow back, and the 32 cm rise is nothing to worry about (after 4 hours, imagine the 24/7 guy observing the 1 mm high wave). It would make more sense when water levels are already high. But then there are indeed people assigned to keep an eye on the crucial infrastructures .

yread 2y ago
Where does 32cm come in? Tide on Dutch North Sea coast is around 2m https://www.tide-forecast.com/locations/IJmuiden-Netherlands/tides/latest https://www.tide-forecast.com/locations/IJmuiden-Netherlands...
- j-a-a-p 2y ago
  The sea is a bit wider than the river. And deeper as well. The 32 cm was the rise mentioned in the article.
seszett 2y ago
> imagine the 24/7 guy observing the 1 mm high wave It's not the flow itself that matters here, the rise is how they found out that there was a problem. The problem is that the sluice was set to manual operation instead of automatic, for an unknown reason, and stayed open when it should not have. The guy would not have noticed a rise, what he would have noticed is the sluice staying wide open for a long time. Also, the water rose 32cm in the canal, not in Amsterdam center. The locks were closed in time to prevent water from rising in Amsterdam, where 32cm could have been a problem. The water level is supposed to be mostly constant in the city center, it doesn't follow the tides. The water does not necessarily "flow back" after a tide either, since most of Amsterdam is below the level of the sea at low tide. It must be pumped out.
- j-a-a-p 2y ago
  Uhm, Holland is here and there below sea level but the rivers aren't. Escher probably could have drawn a map where this could happen, but in reality we still need the rivers to be higher than the sea. edit: canals and baby rivers are lower indeed, they are pumped out and locked

yread 2y ago

Where does 32cm come in? Tide on Dutch North Sea coast is around 2m https://www.tide-forecast.com/locations/IJmuiden-Netherlands/tides/latest https://www.tide-forecast.com/locations/IJmuiden-Netherlands...

j-a-a-p 2y ago
The sea is a bit wider than the river. And deeper as well. The 32 cm was the rise mentioned in the article.

seszett 2y ago

> imagine the 24/7 guy observing the 1 mm high wave It's not the flow itself that matters here, the rise is how they found out that there was a problem. The problem is that the sluice was set to manual operation instead of automatic, for an unknown reason, and stayed open when it should not have. The guy would not have noticed a rise, what he would have noticed is the sluice staying wide open for a long time. Also, the water rose 32cm in the canal, not in Amsterdam center. The locks were closed in time to prevent water from rising in Amsterdam, where 32cm could have been a problem. The water level is supposed to be mostly constant in the city center, it doesn't follow the tides. The water does not necessarily "flow back" after a tide either, since most of Amsterdam is below the level of the sea at low tide. It must be pumped out.

j-a-a-p 2y ago
Uhm, Holland is here and there below sea level but the rivers aren't. Escher probably could have drawn a map where this could happen, but in reality we still need the rivers to be higher than the sea. edit: canals and baby rivers are lower indeed, they are pumped out and locked