Tehnički vjesnik, Vol. 17 No. 2, 2010.
Prethodno priopćenje
The (im)possibility of reducing the meteotsunami amplitude by constructing protective breakwaters
Goran Lončar
orcid.org/0000-0002-6466-3677
; Faculty of Civil Engineering, University of Zagreb, Water Research Department, Kačićeva 26, 10000 Zagreb, Croatia
Dalibor Carević
orcid.org/0000-0002-4634-6192
; Faculty of Civil Engineering, University of Zagreb, Water Research Department, Kačićeva 26, 10000 Zagreb, Croatia
Marin Paladin
; Faculty of Civil Engineering, University of Zagreb, Water Research Department, Kačićeva 26, 10000 Zagreb, Croatia
Sažetak
Shallow water gravity wave caused by motion of atmospheric disturbances increases its amplitude through energy transfer enabled by the Proudman resonance. The waveform signals get further amplified reaching the funnel shaped port basin. If the incoming wave group contains frequencies close to the port's eigen frequencies the resonance with a further increase of wave amplitude is likely to occur. The whole phenomenon is called meteotsunami, and an example of this phenomenon occurred on 21 June 1978 in Vela Luka, where the wave height was registered to be 6 m. The paper deals with carrying out the numerical analysis of the sea level dynamics in the final point brought about due to wave excitation with a maximum height of 0,19 m in front of the entrance to the Vela Luka Bay. In response to the wave excitation in the port's final point, the obtained wave height was 5,5 m. Furthermore, the analysis involving the influence of hypothetical vertical impermeable breakwaters, set on two variant positions outside the entrance to Vela Luka was carried out. The model results indicate that there is a relatively small decrease in wave height.
Ključne riječi
numerical model; meteotsunami; Vela Luka
Hrčak ID:
55487
URI
Datum izdavanja:
30.6.2010.
Posjeta: 2.004 *