Oosterscheldekering
The Oosterschelde barrage ( Oosterscheldekering in Dutch ) is part of the Delta Works , which are mainly intended to protect against storm surges and floods in the Dutch province of Zeeland . The structure, partly dyke and partly mobile barriers, was built between the islands of Schouwen-Duiveland and Noord-Beveland .
The Oosterschelde , like other areas of the delta area, was initially to be separated from the North Sea by a dike . This would have cut off the Oosterschelde from the tides . In the course of time, fresh water would have displaced the salt water , which would have had a massive impact on the entire flora and fauna . In particular, negative effects on mussel and oyster farming near Yerseke would have been expected.
The entire barrier is nine kilometers long. Protests after the completion of the first five kilometers caused the government to rethink, so that a storm surge barrier was built on the remaining four kilometers instead of a dike . During storm surges, the gates are closed, at other times reach ebb and flood the Oosterschelde continue.
There are a total of 65 pillars that weigh up to 18,000 tons and are up to 65 meters high. Between them, 62 movable board gunners, which are 42 meters wide, were suspended. The height of the board guards is between 5.9 and 11.9 meters, the heaviest weigh up to 500 tons. The Tafelschützen can be closed within an hour. The storm surge barrier has to be closed about once a year due to the corresponding weather conditions.
The pillars were built as hollow bodies in a dry dock and then brought into position floating. To ensure a stable foundation, special plastic mats were developed that were filled with stones and placed on the sea floor. The towers were then lowered onto these, then filled with sand and weighted down with stones from the outside.
The Oosterschelde barrage was opened on October 4, 1986 by Queen Beatrix .
An information center has since been set up on the former work island Neeltje Jans .
On July 5, 2015, the facility was the destination of the second stage of the Tour de France .
photos
Single pillar
detail
Hydraulic cylinder of the barrage
Electrical installation of the barrier (detail)
Signature board on the occasion of the opening of the barrage
Land side of the barrage
Detail of the barrage
Road on the barrage
Shivering needles were used by the ship Mytilus to compact the soil under the pillars
Bridge support
Electric control of the barrage (detail)
Web links
- Deltawerke Online - Website about the Oosterschelde barrage, available in German
Individual evidence
- ^ Oosterscheldekering Vrouwenpolder. (No longer available online.) Archived from the original on November 16, 2017 ; Retrieved November 15, 2017 (Dutch). Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
Coordinates: 51 ° 38 ′ 1 ″ N , 3 ° 42 ′ 16 ″ E