Hydralab
Published August 7, 2019 | Version v1
Dataset Open

WALOWA (WAve LOads on WAlls) - Large-scale Experiments in the Delta Flume on Overtopping Wave Loads on Vertical Walls

Creators

  • 1. Ghent University, Department of Civil Engineering, Coastal Engineering, Bridges and Roads, Technologiepark 60, B-9052 Gent, Belgium
  • 2. Maritime Engineering Laboratory, Universitat Politecnica de Catalunya, carreer Jordi Girona 1-3, 08034 Barcelona, Spain
  • 3. Delft University of Technology, Faculty of Civil Engineering and Geosciences, Hydraulic Engineering Department, Stevinweg 1, 2628 CN Delft, Postbox 5048, The Netherlands
  • 4. HaskoningDHV Nederland B.V, George Hintzenweg 85, 3068AX Rotterdam, The Netherlands
  • 5. Faculty of Hydraulic Engineering, University of Architecture, Civil Engineering and Geodesy, Hristo Smirnenski 1 Boulevard, 1046 Sofia, Bulgaria
  • 6. Flanders Hydraulics Research, Berchemlei 115, 2140 Antwerp, Belgium
  • 7. Dipartimento di Ingegneria Civile e Ambientale dell'Università degli Studi di Firenze, Via di Santa Marta 3, 50139 Florence, Italy
  • 8. Technical University of Bari, Department of Civil, Environmental, Building Engineering and Chemistry, E. Orabona 4, 70125 Bari, Italy
  • 9. BRGM, Univerité de Montpellier, 1039 Rue de Pinville, 34000 Montpellier, France
  • 10. University of L'Aquila, Department of Civil Construction-Architectural and Environmental Engineering, via Giovanni Gronchi 18, 67100 L'Aquila, Italy
  • 11. University of Calabria, Department of Civil Engineering, Via P. Bucci 1, 87036 Arcavacata di Rende CS, Italy
  • 12. RWTH Aachen University, Institute for Hydraulic Engineering and Water Resources Management, Mies-van-der-Rohe-Straße 17, 52056 Aache, Germany
  • 13. Research Institute for Water and Environment (fwu), University of Siegen, Paul-Bonatz-Straße 9-11, 57076 Siegen, Germany
  • 14. Engineering Research Center, Department of Civil and Environmental Engineering, 1320 Campus Delivery, Colorado State University, CO 80523-1320 Fort Collins, USA
  • 15. Deltares, Boussinesqweg 1, 2629 HV Delft, The Netherlands

Description

Coasts of low lying countries are often comprised of a gentle foreshore and shallow waters, followed by a dike and a promenade. At the end of the promenade buildings or storm walls are constructed. This setting makes it possible for waves to overtop the dike and impact on the storm wall or building. Especially during storm season the overtopping waves induce large loads on these structures. New scenarios for climate change and sea level rise make it worthwhile to invest in research regarding overtopping wave loads.

Within the European project 'Wave Loads on Walls' (WaLoWa) model tests in the Delta flume (The Netherlands) were conducted. It is the aim to study overtopping wave loads on storm walls and buildings. The project is coordinated by Ghent University (Belgium), in cooperation with TU Delft (The Netherlands), RWTH Aachen (Germany), University of Bari, University of L'Aquila, University of Calabria and University of Florence (Italy) and Flanders Hydraulics Research (Belgium). The project is financed by a grant by Hydralab+ in the framework of the EC Horizon 2020 program.

A model geometry comprised of a sandy beach, a sloping dike, promenade and wall structure was built into the Delta flume. The beach alone consists of 1000m³ sand material and was an essential part of the structure, to obtain the broken wave conditions similar to reality. Waves representing a storm with a 1000 year return period and an additional water level to account for sea level rise result in the tested superstorm conditions.

Measurements of the water surface elevation were taken close to the paddle, along the mildly sloping foreshore and at the dike toe location by resistance type wave gauges mounted to the flume side wall. The bathymetry of the sandy foreshore was measured by a mechanical profiler before and after the test. The overtopping flow properties thickness and velocity were measured by resistance type wave gauges, ultra-sonic distance sensors, paddle wheels and an electro-magnetic current meter installed along the promenade. Finally, the impact forces and pressures on the wall were measured by compression load cells and pressure sensors respectively. The data-set was complemented by a number of synoptic measurements, such as laser scan profiles, GoPro images, High-speed camera images, Digital camera images. Due to its large storage size, these data are provided on request.

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Additional details

Funding

HYDRALAB-PLUS – HYDRALAB+ Adapting to climate change 654110
European Commission