Flood Risk Assessment & Investment Framework: A framework for flood risk reduction strategies in the Hollandsche IJssel

The Hollandsche IJssel is a river between Rotterdam and Gouda and is protected from the main river system in the Netherlands by a storm surge barrier. The Hollandsche IJssel experiences several problems: the storm surge barrier dates from 1958 and has a relatively low closure reliability; three quarters of the dikes have been rejected according...

Protection of Shanghai from Flooding: 'Open or closable navigational section?’

Due to Shanghai’s unique location, it is sensitive to sea level rise and land subsidence, which are directly related to urban flood protection. Flooding of Shanghai can be caused due to the following three factors: storm surge by typhoon, high tidal levels and sustained higher water levels in the Yangtze River and the Huangpu River as a result...

Storm surge barrier Tokyo Bay: Analysis on a system level and conceptual design

Tokyo Bay is an area exposed to storm surges generated by typhoons. Consequently lowlands along its coastline are subject to flood risk. Dike walls, levees and barriers have been developed by the Japanese to protect these coastal areas. In the coming decades it is expected that a rise in sea level will occur. Also, climate change is expected to...

The Bolivar Roads Surge Barrier: A conceptual design for the environmental section

In response to the devastation caused by Hurricane Ike to the Galveston Bay Area, Texas, United States in September 2008, several proposals emerged to protect the region against future storm surges. One of them is a coastal spine called the ’Ike Dike’. A challenge for this 160 km [100 mi] long flood protection is to cross Bolivar Roads, a 2.8 km...

Protecting Nieuwpoort against floods

At the entrance of the IJzer River estuary in Belgium a storm surge barrier is being constructed. This raises a couple questions: At what safety level can the barrier best be built? What barrier type suits the specific site conditions the best? What are the consequences of a storm surge barrier at that location, and how can they be solved? This...

Adaptation of the Hollandsche IJssel storm surge barrier

The storm surge barrier and levees located in the Hollandsche IJssel do not fulfill the current safety standards according to the third nationwide safety assessment. The non-closure probability of the storm surge barrier is too high and the inner slope stability of the levees is too low. Besides the problems regarding the flooding safety also...

Flood protection and marine power in the Wash estuary, United Kingdom: Technical and economical feasibility study

The Wash estuary is situated at the English east coast. Covering an area of approximately 615 km2, the estuary is among the largest estuaries in the United Kingdom. Adjacent to the Wash estuary, the Fenlands are situated, a low lying area covering almost 3900 km2. Within the last century several coastal flood disasters and near flood disasters...

Morphology of the Eastern Scheldt ebb tidal delta

The Eastern Scheldt tidal basin and its ebb tidal delta have changed drastically in the recent centuries under the influence of natural processes and human interventions. A Storm Surge Barrier, one of constructions within framework of Delta Project in the Eastern Scheldt, is considered as the largest impact to changes in hydrodynamics and...

Onderzoek naar de operationele fasen van een spinakerkering

Een spinakerkering is een flexibele waterkering, waarbij het hoogwater wordt gekeerd door een hoogwaardig kunststof doek. De krachten die op het doek komen, worden opgenomen door twee kunststof kabels (onder- en bovenkabel) die de krachten afdragen naar de landhoofden. Aan de bovenkabel zijn drijvers bevestigd. Als de kering buitenwerking is,...

Hoge sterkte betonnen schuiven in de stormvloedkering Oosterschelde

De reden van dit haalbaarheidsonderzoek is het corrosieprobleem van de huidige stalen schuiven in de Stormvloedkering Oosterschelde. Tijdens de bouw van de kering bleek het verven van de schuiven een langdurig proces. Zozeer zelfs, dat men dreigde de officiele opening niet te gaan halen. In overleg met de aannemer is toen besloten een andere...

Subharmonische beweging van een kleppenkering

De stonnvloedkering die ontworpen is voor de lagune bij de stad Venetië bestaat uit kleppen die onder normale omstandigheden verzonken liggen op de bodem. Als een hoge waterstand dreigt kunnen de kleppen vol worden gepompt met lucht, zodat ze, draaiend om een scharnier op de bodem, omhoog drijven en een waterstandsverschil kunnen keren. De...

Keersluis te Ramspol

Litertuurstudie en ontwerp van een keersluis bij Ramspol. Het betreft het ontwerp van een kering met hefdeuren.