Analisa Perubahan Garis Pantai Dan Perencanaan Bangunan Pelindung Pantai Di Negeri Amdua Kecamatan Amahai – Kabupaten Maluku Tengah

Ch. Joseph, Etmon Octavian Latupeirissa

Abstract


Amdua Beach is located in the State (Village) of Amdua which is on the island of Seram, Amahai sub-district, Central Maluku district. Amdua beach is one a beach that is often hit by big waves that cause beach damage. This causes quite severe erosion in that area. This study aims to analyze the magnitude of changes in the beach that occurs at the Amdua beach location, determines the coastal protection building suitable for use, as well as planning a suitable beach building profile for protect coastal areas. In this paper, we use formulaic approaches by using the Excel program to analyze changes coastline that occurs. Analysis of Change (Erosion) shoreline calculation shoreline changes per year using the Komar method as a reference for calculate shoreline changes. From the results and calculations in this study obtained Sedimentation Transport that occurs in the dominant wind direction south, and west power within 1 year of incoming sediment transport (Accretion) of 15.77 m 3 and sediment transport out (Erosion) of 203.64 m3 , within 5 year there is an accretion of 78.53 m 3 and an erosion of 26.79m 3 , and in term 10 years there was an accretion of 156.22 m 3 and erosion of 53.68m 3 . from result analysis of shoreline changes using the komar method, the protective building which is feasible to use at the location of this research is Seawall. The seawall was built at an elevation of ± 0.03 m which based on data analysis means the wave that occurs is the wave has broken so that the dimensions of the building the height is 3.3, the top width = 2 m, and the bottom width is 4 m. the seawall built consisting of 2 layers using the main material is crushed stone, from the calculation of the thickness of the protective stone layer and the design wave height

Keywords


Amdua; Seawall; Planning

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References


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