Hose dam at Ramspol
The hose dam at Ramspol is often referred to as the “balge stuw ”, but it is not a weir . In the overview of the Rijkswaterstaat it is therefore shown as a Kering ( barrage ) and not as a Stuw (weir). Technically, the inflatable dam is similar to a rubber dam . The barrage between the Ketelmeer and the Zwarte Meer north of Kampen (Netherlands) works with three inflatable elements instead of lifting gates. It was built by the Dutch company Hollandse Beton- en Waterbouw for around € 100 million on behalf of the Groot Salland hydraulic engineering authority .
task
The barrage was put into operation in 2002 to protect the area along the Zwarte Sea from flooding that is forced in from the Ketel Sea during a north-west storm. As soon as the level rises to NAP +0.50 m, the system is closed.
construction
The barrier consists of three inflatable elements made of 1.6 cm thick rubberized material with a length of 80 meters each. In the rest position, the bellows lie on three foundations, each 60 m long and 15.4 m wide, 4.65 m below the NAP. When a storm surge threatens, these elements are each filled with 3500 m³ of water and 3500 m³ of air and thus reach a height of around ten meters, which corresponds to a water level of 3.55 m above NAP. The filling time is one hour. When the barrage is closed, shipping is not possible. The hose dam at Ramspol is the world's largest installation of this type. Smaller inflatable barriers have been installed in the Netherlands in the Dinkel , Bornsebeek and Oude Wetering rivers .
Individual evidence
Web links
- Stormvloedkering Ramspol In: Rijkswaterstaat (Dutch)
- Balgstuw bij Ramspol In: Waterschap Drents Overijsselse Delta (Dutch)
Coordinates: 52 ° 36 ′ 41 ″ N , 5 ° 50 ′ 25 ″ E