Hrvatske vode, Vol. 24 No. 98, 2016.
Prethodno priopćenje
The impact of culverts on the seawater exchange and wave action in marina waters
Goran Lončar
orcid.org/0000-0002-6466-3677
; Sveučilište u Zagrebu, Građevinski fakultet, Zagreb, Hrvatska
Damir Bekić
; Sveučilište u Zagrebu, Građevinski fakultet, Zagreb, Hrvatska
Dalibor Carević
; Sveučilište u Zagrebu, Građevinski fakultet, Zagreb, Hrvatska
Damjan Bujak
; Sveučilište u Zagrebu, Građevinski fakultet, Zagreb, Hrvatska
Ivana Bartolić
; Tehničko veleučilište u Zagrebu, Zagreb, Hrvatska
Gordana Beg Paklar
; Institut za oceanografiju i ribarstvo, Split, Hrvatska
Sažetak
The paper presents the results of the conducted numerical simulations of circulation and wave dynamics in the marine waters whose main pier contains a constructed culvert in four variant positions. A hypothetical marina with a length of 300 m, width of 150 m, entrance width of 25 m and variable depths from 3 to 7 m was analysed. The culvert positions (4) and widths (5m and 10m) in the pier were varied as well as the seabed elevations (-1 m, -2 m, -3 m, -5 m, marina seabed) of the marina. The model of seawater circulation and exchange was forced by wind action (of N, NE, E, SE, S, SW, W, NW directions) with a hypothetical distribution of velocities (linear increase from 0 to 5 Bf and linear decrease from 5 Bf to 0) and tidal oscillations during the 24-hour simulation period. The transmission of wind wave energy through the culvert was analysed for the wave heights H = 0.6 m, 1.0 m and 1.5 m and associated wave periods T = 3.1 s, 4.0 s and 4.9 before the pier. The presented results facilitate such selection of the position and geometry of the culvert as to achieve the maximal seawater exchange with the set condition of the permitted wave disturbance. The practical application of the obtained results was presented on the example of the Zadar marina.
Ključne riječi
culvert; marina; Adriatic Sea; numerical model
Hrčak ID:
171614
URI
Datum izdavanja:
28.12.2016.
Posjeta: 1.647 *