Akademik Veri Yönetim Sistemi
10th Short Course/Conference on Applied Coastal Research, İzmir, Türkiye, 4 - 06 Eylül 2023, ss.115
In this study, the beach restoration project to create an artificial beach for the use of citizens in Afetevler distinct in Mersin upon request of Mersin Metropolitan Municipality is presented. The coastal defense system designed in the project is described and the numerical investigations on the performance of the defense system are presented. The numerical investigations were performed using XBeach (Roelvink et al., 2009) and a one-line numerical model (Ergin et al., 2006) models. As the first step of this study, wind and wave climate of the project area were studied to determine the deep water and nearshore wave characteristics of the project region. For this purpose, four different wind and wave databases were considered: CFSR, ECMWF, CMEMS-Copernicus databases and ‘Türkiye Kıyıları Rüzgar ve Derin Deniz Dalga Atlası’ (Özhan, Abdalla, 1999). Long-term and extreme wave statistics were carried out for the data gathered to determine the design wave characteristics. SWAN numerical model was used to obtain the nearshore wave characteristics of the design waves, which were inputted to the numerical models XBeach and CSIM. The bathymetric data to be used in the numerical models was gathered from GEBCO, Navionics, and the measured bathymetry data. The sediment parameters to be used in the beach nourishment, were determined based on the results of the conducted sediment sampling and sieve analyses. Studies in the scope of this project were separated into two parts as West and East sides of Mersin Marina. Several alternative defense systems were studied to find the optimal solutions for these regions. In the study, four different scenarios were studied for 1 year, 5 years and 10 years projections. In the first step, using CSIM, the shoreline change for the following years was studied for the present situation of the beach that no soft or hard measures are applied. After this step, alternative defense system solutions that include only soft measures (nourishment), only hard measures (coastal structures), and both soft and hard measures were simulated using XBeach and CSIM numerical models. CSIM numerical model was used to observe the longshore sediment transport variations and corresponding shoreline changes for the proposed solutions by using CERC (1984) and Kamphuis (1991) methods. XBeach was used to perform one-dimensional cross-shore profile modeling to observe the morphological change perpendicular to the shoreline. The proposed solutions were also studied in XBeach two-dimensionally to observe both longshore and cross-shore sediment transport effects of the proposed solutions. Upon request of Mersin Metropolitan Municipality, a beach restoration project was prepared to create an artificial beach in Afetevler distinct, Mersin. In the scope of this project, several alternative defense systems were proposed and future shoreline projections of these solutions were carried out by using XBeach and CSIM numerical models to determine their effectiveness. The success of the proposals will be tested with field observations and measurements to be made after the implementation of the project.