The new model takes less time to install, has a streamlined design and is vandalism-proof. (more…)
The new model takes less time to install, has a streamlined design and is vandalism-proof. (more…)
A lot of hard work was done to finish the road and masonry around the old harbor before Christmas. From the 24th of December until the 8th of January the machines will be quiet for a while. The work will be paused during this period.
The Self Closing Flood Barrier around the historic port of the former fishing village is sunk into the ground. The second phase of the work will start after the Christmas holidays. The remaining 162 meters of the Self Closing Flood Barrier will be placed around the new port. Currently preparations are being made here for the placement of the Self Closing Flood Barrier. The quay wall will also be stabilized. From mid-February, a few streets will be raised to secure them against flood water.
Check out this video of the installation of the self closing flood barrier in the Old Port.
At the end of September the Self Closing Flood Doors (SCFD) were installed and tested at the museum. These are a preview of the world’s longest buoyant flood barrier that will soon be installed at the port. (more…)
In the near future, the historical centre of the Dutch town of Spakenburg will be protected against flooding by a rising dam, powered by the upward force of the water. With its total length of 335 metres, this floating dam will be the longest in the world. The dam – 80 centimetres in height – will be submerged in the road surface surrounding the historical fishing harbour, to prevent the dam from influencing the sights of the historical centre. The dam will be fixed into the raised embankment alongside the new harbour.
The project is part of the dam improvement alongside the Zuidelijke Randmeren (Southern Border Lakes) and the Eem River, passing through the Water Board Valley and the Veluwe national park. The national programme for the prevention of high water, the ‘Hoogwaterbeschermingsprogramma’ is funding the project. Construction will start in the autumn of 2016.
The tender for this project, called by the water board, was won by the Dutch building consortium Van Heteren (Hengelo)/Jansen Venneboer (Wijhe). The project called for an innovative solution, and the rising dam design was the best match for the design requirements. The project asked for the solution to blend into the historical centre, taking up little space and with a maximum deployment time of three hours, requiring only a few employees of the water board.
The technique is supplied by the Belgian company Aggéres. Although the technique has been used before, on different locations worldwide, the Spakenburg project will be the first time it is constructed at such a large scale and as part of the primary water barrier. This will make this a good example for other historical city centres in the Netherlands, such as Dordrecht.
The water barrier will float upwards as a result of the rising water level in the harbours. This water will fill the steel container holding the dam. The dam is made from a light weight plastic, with a steel cover. The incoming water will push up the dam.
The dam will be incorporated into the road surface surrounding the historical harbour (approximately 60 metres of the Turfwal and some 115 metres of the Oude Schans). The embankment lining the new harbour (Kerkemaat) is raised 60 centimetres; this elevation will hold the dam (about 160 metres). The park on the south side of the new harbour (Weikamp) will be redesigned, in order to fulfil its water containing function.
There will be no new water barrier at the other length of the marina (Havendijk). This will remain ‘outside the dam’. The buildings there have been built to withstand high water.
As a result of the construction of the floating dam, the water barrier at Spakenburg will meet the current requirements, to withstand water levels that occur during north-western storms at wind force 12. This is the requirement that all dams alongside the Zuidelijke Randmeren and the Eem must meet. Because these dams protect a large area against high water levels, this construction is called the ‘primary water barrier’, and the requirements for these barriers have been determined by the State. The construction of the floating dam is funded by the national High Water Protection Programme, a cooperative body of the Dutch water boards and the Department of Waterways and Public Works.
This autumn, Aggeres will introduce a new innovative flood defense to the public. As a teaser, the company now launches a new 3D ‘augmented reality’ app that allows you to see this new flood defense, as well as their other products, in operation. The Aggeres app shows a section of a virtual town flooding, time and time again. In this town, the new flood barrier serves to protect a bank building, an entrance to an underground car parking, and a metro entrance. The SCFB (self-closing flood barrier) and the Velox (rapidly deployable emergency flood defense system) also help protect the town against the rising waters.
Over the last two years, the Velox emergency flood barrier has been demonstrated successfully in the test facilities of Flood Proof Holland (affiliated with the University of Delft) and has repeatedly proven its efficiency in operation. The existing SCFB (Self-closing Flood Barrier) has also been implemented in a number of large projects this year.
Aggéres (formerly BFDS NV) will now focus on innovation in the promising flood defense industry. Phenomena of flooding occur more and more often. As such, the demand for movable flood barriers, in addition to solid embankments, is on the rise. Last year, Aggeres launched the Porta flood barrier for the private market. Porta is a made-to-measure flood barrier that can easily be clicked into place inside a door or window aperture to prevent the water from entering the house. Several private residences in Flanders and the Netherlands already use the Porta to protect them against water damage.
In urban environments, there is an increasing demand to install complementary, separate flood defenses, in addition to the traditional embankments. They serve to protect important buildings and public spaces, such as car parks or metro entrances. Aggeres is presently testing a new watertight gate that can be integrated into a very compact module and that offers protection against the rising water up to a height of 4m. Last but not least, Aggeres has built its own test facility for the water pressure tests.
Would you like to see for yourself how our products operate? Then visit www.aggeres.com/ar and follow the instructions to download our app. The app is available in the App Store for iPhone and iPad and is also available for Android. All you have to do is point the app at the below drawing, and watch as the virtual world comes alive.
Acqua Alta Germany
Aggeres will be exhibiting on the Acqua Alta Trade Fair in Essen Germany on November 18th and 19th 2014
Join us in Hall FO Stand NR. 12
Flood control ASIA
Aggeres will be exhibiting on the Flood Control ASIA Trade Fair in Kuala Lumpur, Malaysia on November 20th and 21th 2014
Join us at Stand Nr. A132-A137
According to the most accurate model yet developed, flood damage losses across Europe are expected to increase four fold by 2050.
The scientists believe that the continent’s annual flood costs may be 2.5bn euros by the middle of the century.
Two-thirds of the projected increase in flood damage will be caused by human development, not climate change.
The study has been published in the journal Nature Climate Change.
One of the big problems for European flood disaster research has been that countries tend to do their risk assessments on their own, using different models and methodologies compared with their neighbours.
“This is not an accurate way of working,” said lead author Brenden Jongman from VU University in Amsterdam.
“We show that if you have very high flood risk in the UK there is also a very high risk in northern France, the Netherlands and some parts of Germany.”
Rather than looking at individual flood risks, the team decided to look at maximum water discharges in over 1,000 European river sub-basins, or parts of catchments.
They found that different rivers often reach dangerous levels at the same time, threatening large regions.
“If you don’t take into account these spatial co-relations then you highly underestimate the risk – there is a much higher risk than we actually think so far,” said Mr Jongman.
“We say the average annual losses are expected to increase by a factor of four between now and 2050.”
The researchers tested the model by looking at data from rivers between 2000 and 2012. From that information they estimated that annual flood losses across Europe would be 4.9bn euros per year. Reported annual losses were 4.2bn.
Using the same system, the team estimates that annual losses by 2050 across Europe would be 23.5bn euros.
Looking at the disastrous summer floods in Central Europe last year that cost 12bn euros in losses, the researchers estimate that the chances of an event like this happening in 2050 will have increased from once in 16 years to once in 10.
The scientists say that this is the first time they can look at the probability of total damages from floods across Europe.
And while climate change is an important factor, according to Brenden Jongman, it is not the critical element in their model.
“About two-thirds is caused by socio-economic growth,” he said.
“More people are living in flood-prone areas, [and] the income per capita is increasing in the dangerous areas around Europe.”
Climate change cannot be dismissed and is likely to cause precipitation events to become more intense, and flood waters will likely be deeper and last longer.
While the increase in losses from floods is significant, the scientists believe that by investing in defences and mitigation, governments can limit the economic impact.
The amount of damages likely to be caused is far more than the costs of prevention, but Brenden Jongman says that political issues muddy the waters.
“The costs of these investments come up front, but the benefits of this flood protection might be in the future, not in the current government’s term.
“There may be no votes for them.”
Follow Matt on Twitter @mattmcgrathbbc.
The name change allows us to increase our ambitions; We want to expand our territories beyond the borders of the Benelux, or even outside Europe.
Aggéres is short, recognizable and represents our desire to act.
The word “Aggeres” is Latin for “dykes”.