First experiment in new Delta Flume successful
Published: 23 July 2015
Dike cladding research
An 11-metre-high dike was built up in the new Delta Flume, a unique research facility in Delft that can generate the highest artificial waves in the world. Approximately 5000 Basalton blocks (scale 1:1.6) were positioned on the dike. Last month, Deltares looked at exactly how strong this type of cladding is. Other types of stone have been tested previously in the old Delta Flume.
Mark Klein Breteler, the cladding study project director: ‘The new Delta Flume is quite a bit deeper than the old Delta Flume and it can also generate larger waves. The waves are 35% larger, and so we can simulate reality even more accurately and conduct more reliable studies’.
More knowledge about stability and reducing wave run-up
This experiment was the 9th and final series in the ‘Comparative study of dike cladding’, a project involving a number of government agencies (Rijkswaterstaat, Fryslân water authority, Noorderzijlvest water authority, Hunze and Aa’s water authority, Afsluitdijk barrier dam project, Sea Defences Project Bureau), five private bodies and Deltares. A total of nine types of stone from five different producers were studied. Basalton®, C-Star®, Hillblock®, Hydroblock®, RONA®ton and Verkalit®, of some types different models.
The final report from Deltares is expected in the autumn.
Government, market and research institutes achieve a great deal in partnership
The new data will ultimately be used in software (‘Steentoets’), so that better calculations can be made to show exactly how large cladding stones should be. In this way, it will be possible to design and maintain dikes more precisely in the future. This will help the environment and the locality, and result in cost savings. Furthermore, the study has demonstrated that, when they work together, government, market parties and research institutes can achieve a great deal.