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Author
Eka, Aji Saputro

Advisor
M. Gilang, Indra Mardika, S.T., M.T.
Indri, Rahmandhani Fitriana, S.T., M.Eng.

Koleksi
Student Dissertations and Theses

Publisher

Reporting from the National Disaster Management Agency (BNPB) in 2021, abrasion occurred at Suwuk Beach, Kebumen Regency, Central Java Province. This beach is one of the tourist destinations in Kebumen. The impact of this abrasion is a significant change in the coastline. One effort to overcome this problem is to plan coastal protection buildings in accordance with the parameters and urgency of Suwuk Beach. The parameters in planning coastal protection structures include significant wave height, tides, especially the HHWL (Highest High Water Level) value, refraction coefficient and shoaling coefficient for the transformation of sea waves into shallow seas, sea level rise, and Sea Level Rise. Data on significant wave height and period were processed using the Weibull probability distribution at a 50 year return period with extreme wave height and period values of 2.293 meters and 8.274 seconds respectively. Waves that propagate towards shallow water undergo wave transformation by the refraction coefficient and shoaling coefficient, resulting in a deformation wave height value of 2,279 meters at a depth of 5 meters. Using the Admiralty method, the HHWL value was obtained at 2,338 meters. The value of sea level rise due to waves is 0.214 meters. The best estimate for sea level rise in 2075 is 0.240 meters. So it can be concluded that the design water level value obtained is 3,031 meters. The coastal protection structure chosen is an offshore breakwater because it functions to maintain the position of the coastline and maintain the function of Suwuk Beach as a tourist destination. The breakwater planning uses a type of boulder protection layer where a wave propagation value of 1.04 meters is obtained with the elevation of the breakwater peak being at a height of 5 m, a peak width of 2,100 meters, layer thicknesses of 2,100 meters, 1,000 meters and 0.400 meters respectively. The designed breakwaters are arranged in a series along the survey location to minimize the chance of buttonholes occurring after the construction is built.

URI
https://repo.itera.ac.id/depan/submission/SB2409110002

Keyword
gelombang signifikan transformasi gelombang Design Water Level Highest High Water Level breakwater boulder