Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 20, Dec. Suppl. No.2, 2018; Page No.(149-157)

OCEAN WAVES ANALYSIS FOR SUBMERGED BREAK WATER PLANNING TO OVERCOME THE DAMAGE OF TIMBULSLOKO COASTAL AREA, DEMAK, INDONESIA

DENNY NUGROHO SUGIANTO, SYARABILLA, SUGENG WIDADA, ANINDYA WIRASATRIYA, BASKORO ROCHADDI, HARIYADI AND MUHAMMAD HELMI

Abstract

Timbulsloko Demak is one of the densely populated areas in Central Java Province which has a complex problem of erosion and coastline changing of up to 100 m per year. This erosion has reached an area of 938.73 hectare which is caused by ocean waves to the coast. The purpose of this research is to determine the height and the depth of breaking waves. Other than that, we also are determined the most optimal design of submerged breakwater to protect the coast as a consideration in planning the construction of a coastal protection structure in the waters of Timbulsloko, Demak, Iindonesia. Wave modeling was used as a mathematical approach. Based on the data processing, it is known that submerged breakwaters can be planned to be built at a minimum depth of breaking waveranging from 1.5 to 2.5 meters and the maximum breaking wave in the depth ranging from 1.8 to 3.8 meters with a breaking wave height ranging from 1.2 to 2.5 meters. While, the most optimum submerged breakwaters used as an alternative building in reducing wave height is submerged breakwater with a building height of 75% of the water depth.

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