3 ms·
This is the first time it closed automatically, because the sea level crossed the "3 meter above average"-threshold. The other closes were "optional", mostly t
by landgenoot 3y ago
This is the first time it closed automatically, because the sea level crossed the "3 meter above average"-threshold.
The other closes were "optional", mostly to check how it performed during a real storm.
- move-on-by 3y agoThank you for the explanation. Turns out I stopped reading a little too early: > In order to test the barrier in actual stormy conditions, the water level threshold at which the computer system would start the closing procedure was lowered from 3.0 m over NAP to 2.6 m, for the duration of the 2007 storm season. On 8 November 2007, a storm from the northwest hit the Dutch coast. A storm surge, high enough to start the barrier's closing procedure, occurred.