![delta flume delta flume](https://www.vizualism.nl/wp-content/uploads/STILL_2015_Deltaflume_top_hdr.jpg)
We are focusing on external stability (movement of rock in the top layer of the scour protection), internal stability (winnowing of underlying sand through the scour protection layer) as well as flexibility in case of edge scour or a lowering ambient seabed (falling apron behaviour). We conduct model tests on different scales to investigate all possible failure mechanisms of the conventional rock protection methods. For these -relatively well understood methods- we aim at filling the gaps of available datasets by testing a large range of hydrodynamic conditions as well as many different rock gradings. First, conventional scour protection methods consisting of loose rock are considered for application around monopile foundations or at cable crossings. In JIP HaSPRo we focus on three scour protection methods (see Figure 2 for some example). This comparison is based on an extensive model test programme performed in Deltares' facilities, the scale of which ranges from 1:50 to 1:1, including the world's largest wave flume (Delta Flume), see Figure 1.įig 1: Overview of hydraulic test facilities that were used in the test programmes of JIP HaSPro: (left) Scheldt Flume, (middle) Atlantic Basin (right) Delta Flume This comparison is aimed at optimizing existing methods, testing new methods and providing recommendations/guidelines on when and where to apply which method. In JIP HaSPro a generic, science-based and systematic comparison is made between different scour protection methods. To that end, Deltares has teamed up with the offshore industry and certifying bodies to launch a Joint Industry Project: JIP Handbook Scour and cable PROtection (JIP HaSPro). Large cost saving can be achieved by selecting the most suitable scour protection system for each application, and/or by optimizing the scour protection design. To prevent this, a scour protection is typically applied. This can -among others- result in a reduction of the lateral load capacity of foundations, free spanning of line-infrastructure and a reduction of the fatigue life (FLS). The (local) erosion of sediment results in a lowering seabed level. Impression of Deltares' current Delta flume at Markenesse.Offshore structures (foundations, cables, pipelines, jacket footings) often experience scour at the interface with the seabed. This news item is based on the press released published on the website of Deltares The new Delta Flume will be located next to the other experimental facilities of Deltares, including the Atlantic basin (650 m2) and the Delta basin (250 m2) for investigations related to flow forces, discharge coefficients, specific design details, bed protection and morphological impact of hydraulic structures.
![delta flume delta flume](https://image.slidesharecdn.com/iahr2015-thenewdeltaflumeforlarge-scalephysicalmodeltestingvangentdeltares29062015-150709192326-lva1-app6892/95/iahr-2015-the-new-delta-flume-for-largescale-physical-model-testing-van-gent-deltares-29062015-1-638.jpg)
MTS will install its most powerful wave generator ever build, enabling Deltares to experiment with both regular and irregular waves. This allows the significant wave heights to be bigger, up to 2.2 m. Worldwide it will not be the longest one (Forschungszentrum Küste, Hannover, Germany has a flume of 309 m), but it will be world’s deepest. The flume of the new facility will be 300 m long, 9,5 m deep and 5 m wide. MTS System Corp (USA) is responsible for the construction of the wave generator. The new Delta Flume will be completed in November 2013 and replaces the existing flume at the other test location of Deltares in Markenesse.īallast Nedam Infra is building the Delta Flume. The new facility is unique as far as size and test features are concerned. On 12 September, the research institute Deltares started building the new wave test facility Delta flume at their premises in Delft.