delta works oosterschelde storm flood barrier

1953 architecture barrage barrier blocking blue bridge close closed cloud clouds construction control delta deltaworks disaster dutch ebb ebbtide energy engineering europe flood floodcontrol gate holland impressive jans nature neeltje netherlands north northsea ocean oosterschelde oosterscheldedam oosterscheldekering open outdoor pillar poles power prevent prevention protect protecting protection safe safety sea sky storm stormvloedkering structure surge technology tide water watermanagement works zeeland