Βελτιστοποίηση διάταξης προσήνεμου μώλου λιμένα Κολυμπαρίου με χρήση υπολογιστικού μοντέλου

Abstract

The present study examines the operation of the windward mole, regarding the protection it provides to the basin and widely to the port of Kolympari from incident waves of main direction and specifically from waves of northern direction. The likelihood of optimising the mole arrangement, via extension of the mole, is also studied. A satisfactory answer to the problems that wind-generated waves create can be given by laboratorial research of various solutions in natural effigy, as well as with the use of numerical models. The latter can impress the conditions of the harbours‟ area of study in a very satisfactory degree and with the realisation of numerical applications the most optimal possible solution for the protection of the harbour can be found. The windward mole of the port of Kolympari constitutes an outer harbour construction with sloping sides, according to the new arrangement that was proposed by the municipality of Kolympari. In the particular study, the new arrangement (D3) that was proposed by the municipality, the existing arrangement (D1) and an additional arrangement (D2) are examined. Nine one-dimensional waves were selected to be simulated and their choice was made by a previous experiment that was carried out in the Laboratoty of Harbour Works of the National Technical University of Athens. The simulation of the wave phenomena in the area of study was achieved using the numerical model MIKE 21BW, which measured the height of waves that reaches 7 characteristic points inside and outside the basin, depending on the initial waves‟ characteristics, for the three different arrangements of the windward mole. According to the results of the numerical simulations and after their processing and analysis, it is concluded that the existing arrangement (D1) of the windward mole provides enough protection to the port, while the second arrangement (D2), in which the mole is extended by 50m, constrains the wave height to a larger extent. In the third arrangement (D3), in which the windward mole is extended from the second arrangement (D2) by additional 50m under a corner of 30ν to south, it is observed that the height of waves is constrained to even greater extent, providing the most optimal protection in the port. Moreover, it is observed that for a particular height of incident waves, as long as the wave period increases, the wave height also increases inside the basin. Finally, according to the wind data, for the existing arrangement (D1) of the windward mole, the port is not functional for 7 days of the year.