WAVE RUN-UP OBSERVATIONS ON REVETMENTS WITH DIFFERENT POROSITIES

Stefan Schimmels, Michalis Vousdoukas, Dagmara Wziatek, Katharina Becker, Fabian Gier, Hocine Oumeraci

Abstract


Wave run-up plays an important role in the design of coastal protection structures. However, none of the existing formulae for wave run-up predictions explicitly considers the effect of revetment porosity. Recently, two revetments have been tested in the Large Wave Flume (GWK) of Forschungszentrum Küste (FZK), a new type of highly porous polyurethane bonded (PBA revetment) revetment and a smooth interlocked pattern placed concrete block revetment (IPPB revetment), which is considered as “weakly permeable” for the present study. Wave run-up is evaluated by video data analysis based on timestack image processing. The results derived from the timestacks are compared to run-up data measured with conventional wire gauges and the good agreement demonstrates the accuracy and reliability of the video data analysis. The effect of the porosity of the revetment is incorporated into the EuroTop wave run-up formula, showing that for the present case it may reduce the relative run-up heights Ru,2%/Hm0 by about 25 % to 50 % as compared to a smooth impermeable slope.

Keywords


porous revetment; wave run-up; video data analysis; large scale model tests

References


Aagaard, T., Holm, D., 1989. Digitization of wave runup using video records. Journal of Coastal Research, 5, pp. 547–551.

Battjes, J.A., 1974. Surf similarity. Proceedings of 14th International Conference on Coastal Engineering (ICCE), Copenhagen, Denmark, ASCE, pp. 466–480.

EuroTop (2007) European Overtopping Manual edited by Pullen, T., Allsop, N.W.H., Bruce, T., Kortenhaus, A., Schüttrumpf, H., Van der Meer, J.W.; Die Küste, Heft 73, Kuratorium für Forschung im Küsteningenieurwesen. www.overtopping-manual.com.

Gier, F., H. Schüttrumpf, J. Mönnich, Van der Meer. J., 2012. Stability of interlocked pattern placed block revetments. Proceedings 33rd International Conference on Coastal Engineering. (ICCE), Santander, Spain, ASCE.

Holman, R.A., 1986. Extreme value statistics for wave run-up on a natural beach. Coastal Engineering, 9, pp. 527–544.http://dx.doi.org/10.1016/0378-3839(86)90002-5

Hunt, I.A., 1959. Design of seawalls and breakwaters. J. Waterw. Harb. Div. ASCE, 85 (WW3), pp. 123–152.

Iribarren, C.R., Nogales, C., 1949. Protection des ports. Proceedings of 17th International Navigation Congress, Lisbon, Portugal.

Liebisch, S., J.C. Alcérreca Huerta, A. Kortenhaus, H. Oumeraci. 2012. Bonded porous revetments - Effect of porosity on wave-induced loads and hydraulic performance, Proceedings of 33rd International Conference on Coastal Engineering (ICCE), Santander, Spain, ASCE.

Mase, H., 1989. Random Wave Runup Height on Gentle Slope. Journal of Waterway, Harbors Division, ASCE, 115 (5), pp. 649–661.

Nielsen, P., 1989. Wave setup and runup: An integrated approach. Coastal Engineering, 13 (1), pp. 1-9.http://dx.doi.org/10.1016/0378-3839(89)90029-X

Otsu, N., 1979. A threshold selection method from gray-level histograms. IEEE Trans. Syst. Man. Cybern, 9, pp. 62–66.http://dx.doi.org/10.1109/TSMC.1979.4310076

Oumeraci, H., Staal, T., Pfoertner, S., Ludwigs, G., Kudella, M., 2010. Hydraulic Performance, Wave Loading and Response of Elastocoast Revetments and their Foundation – A Large Scale Model Study. Berichte Leichtweiß-Institut für Wasserbau, Technische Universität Braunschweig, Nr. 988, Braunschweig, Germany.

Oumeraci, H., Staal, T., Pförtner, S., Ludwigs, G., 2012. Hydraulic performance, wave loading and response of PBA revetments and their foundations. European Journal of Environmental and Civil Engineering, pp. 1–28

Ruggiero, P., Holman, R.A., Beach, R.A., 2004. Wave run-up on a high-energy dissipative beach. Journal of Geophysical Research, 109 (C06025).

Stockdon, H. F., Holman, R. A., Howd, P. A., Sallenger, J. A. H., 2006. Empirical parameterization of setup, swash, and runup. Coastal Engineering, 53 (7), pp. 573–588.http://dx.doi.org/10.1016/j.coastaleng.2005.12.005

Synolakis, C.E., 1987. The run-up of solitary waves. Journal of Fluid Mechanics, 185, pp. 523–555.http://dx.doi.org/10.1017/S002211208700329X

Vousdoukas, M.I., Velegrakis, A.F., Dimou, K., Zervakis, V., Conley, D.C., 2009. Wave run-up observations in microtidal, sediment-starved pocket beaches of the Eastern Mediterranean. Journal of Marine Systems, 78 (Supplement 1), S37-S47.http://dx.doi.org/10.1016/j.jmarsys.2009.01.009

Vousdoukas, M. I., Wziatek, D., Almeida, L. P., 2012. Coastal vulnerability assessment based on video wave run-up observations at a meso-tidal, reflective beach. Ocean Dynamics, 62 (1), pp. 123–137.http://dx.doi.org/10.1007/s10236-011-0480-x


Full Text: PDF

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.