Experimental Investigation of Effects of Coastal Morphology on N-Waves

Abstract

A Leading Depression N-wave which consists of a negative and a positive amplitude solitary wave was generated with the help of a special designed wave pallet at Istanbul Technical University Hydraulic Laboratory. In addition, generated N-Wave was verified by using verification of related analytical equations. Furthermore, the wave flume was narrowed by narrowing angles of 5°, 10° and 15° for analogy to morphology changes in coastal areas. It was determined that water level differences and phase shifts occurred to the narrowing effects.

Keywords

• N-Wave,Leading Depression N-wave,Solitary Wave,Tsunami

References

1. Baş, B. 2007: Examining stability of rubble mound breakwaters under tsunami wave attack, MSc. Istanbul Technical Uni., Istanbul, Turkey (In Turkish).
2. Gedik, N. 2004: Experimental investigation on runup height of long waves. PhD Thesis, Istanbul Technical Uni., Istanbul, Turkey (In Turkish).
3. Gedik, N., Irtem, E. and Kabdasli, S., 2005: Laboratory investigation on tsunami run-up. Coastal Engineering Journal. Vol. 48, No 4, pp. 337-353.
4. Gedik, N., Irtem, E. and Kabdasli, S., 2006: Experimental Investigation On Solitary WaveRun-Down And Its Effects On Armor Units. Ocean Engineering. Vol. 32, pp. 513-528.
5. Irtem, E., Gedik, N., Kabdasli, S. and Yasa, N.E. 2009. Coastal forest effects on tsunami run-up heights. Ocean Engineering. Vol. 36, pp. 313-320.
6. Madsen, P.A., Fuhrman, D.R. and Schaffer, H.A., 2008: On the solitary wave paradigm for tsunamis. J. Geophysical Research 113, C12012.
7. Madsen, P.A. and Schaffer, H.A., 2010: Analytical solutions for tsunami run-up on a plane beach: single waves, N-waves and transient waves. Journal of Fluid Mechanics,vol39, pp 27-57.
8. Synolakis, C.E and Bernard, E.N, 2006. Tsunami science before and beyond Boxing Day 2004. Philosophical Transactions of The Royal Society, 364, 2231–2265.

9. Tadepalli, S. and Synolakis, C.E., 1994. The Run-Up of N-Waves on Sloping Beaches. Proc. R. Soc. Lond. A 1994 445 99-112; DOI: 10.1098/rspa.1994.0050.
10. Tadepalli, S. and Synolakis, C.E., 1996. Model for the Leading Waves of Tsunamis. Physical Review Letters, 77, 2141.
11. Yüce, A. 2007: Experimental analysis of the effects of long waves on vertical faced coastal structures, MSc. Istanbul Technical Uni., Istanbul, Turkey (In Turkish).