TEGAL BESAR BEACH REHABILITATION WITH SCALLOPED CONCRETE BLOCK REVETMENT
Abstract
Klungkung has a coastline of 113 km out of a total of 5780.06 km2 the coastline in the province of Bali, but about 25 km is eroded. One of the critical areas occurs in Tegal Besar beach which caused erosion of 0.08875 to 3.0915 m/yr. Revetment with scalloped concrete blocks is expected to protect land from the wave attack. Concrete blocks have uniform size and shape, showing the aesthetic aspect so as not damage the beauty of the beach. Analysis of wind, tidal, bathymetry and soil data are carried out to obtain the structure and stability of the revetment. The results of this design can be used to rehabilitate the condition of the Tegal Besar beach. From the analysis, the design wave height with a return period of 25 years (H25) = 0.891 m, while the height with the breaking wave (Hb) = 1.003 m and the breaking wave depth (db) = 1.068 m and the design water level elevation (DWL) = 2.061 m calculated from MSL. The revetment structure has a height of 4.00 m, a peak width of 1.50 m, the weight of the first layer of protection is 300 kg and the second is 30 kg with a thickness of 1.00 m. Toe protection are 1.25 m high, 3.00 m wide and weigh 150 kg. The results showed that the revetment was stable against overturning, shearing, and the bearing capacity of the soil was declared safe with the results of overturning stability 22,075 > 2, slidding stability 2.249 > 1.5 and the bearing capacity of the soil 57,993 > 3 so that the revetment can be eligible to be applied at the site.
Downloads
References
Dede M. Sulaiman. (2018). Beton Dan Teknologi Pracetak Pada Bangunan Pengaman Pantai. Deepublish Publisher.
Hariyanto, T., Mukhtar, M. K., & Pribadi, C. B. (2018). Evaluasi Perubahan Garis Pantai Akibat Abrasi Dengan Citra Satelit Multitemporal (Studi Kasus: Pesisir Kabupaten Gianyar, Bali). Geoid, 14(1).
Suryawan, I. N, Eryani, I. G. A. P and Rahadiani, A. A. S. D. "Perencanaan Bangunan Jetty Dari Bahan Bronjong Pada Muara Sungai Tukad Melangit Di Banjar Tegal Besar Kabupaten Klungkung", PADURAKSA, vol 8 no. 1, pp. 16-26, 2019.
Indrasari, D. (2020). Identifikasi Masalah Dan Model Pengelolaan Wilayah Pesisir: Studi Kasus Provinsi Dki Jakarta. Jurnal Kajian Teknik Sipil, 5(01).
Kementrian Pekerjaan Umum Dan Perumahan rakyat. (2020). Pekerjaan Pembangunan Pengamanan Pantai Ruas Tegal Besar - Lepang di Kabupaten Klungkung.
Mangare, J. B. (2016). Penerapan Metode Analyical Hierarchy Process Untuk Pemilihan Sistem Pengamanan Pantai. Jurnal Sipil Statik, 4(11).
Muda, A. (2016). Analisis Daya Dukung Tanah Fondasi Dangkal Berdasarkan Data Laboratorium. Jurnal ITEKNA, 16(1).
Nugraha, I. N. J., Karang, I. W. G. A., & Dharma, I. G. B. S. (2017). Studi Laju Perubahan Garis Pantai di Pesisir Tenggara Bali Menggunakan Citra Satelit Landsat (Studi Kasus Kabupaten Gianyar dan Klungkung). Journal of Marine and Aquatic Sciences, 3(2), 204.
Pujianiki, N. Y., Ketut, S., & Saputra, A. C. (2019). Revitalizing the Batu Mejan Beach with Geotextile Breakwater. IOP Conference Series: Earth and Environmental Science, 248(1).
Pujianiki, N. Y., Diputra, I. G. A, Jayantari, M. W. and Mataram, I. N. K., "Coastal Protection Work for Batu Mejan Beach, Bali", MATEC Web of Conferences, vol. 276, no. 04019, 2019,
Putra, I. K. S. W., Yujana, C. A., & Surayasa, N. (2017). Perencanaan Bangunan Pengaman Pantai (Revetment) Dengan Bahan Geobag Di Pantai Masceti, Kabupaten Gianyar. 6 (2), 178–189.
Sanjaya, I. N. W. (2020). Perencanaan Revetment Dengan Blok Beton 3B (Berkait, Berongga Dan Bertangga) Di Pantai Batu Mejan Kabupaten Badung. In Skripsi.
Zamdial, Z., Hartono, D., Bakhtiar, D., & Nofridiansyah, E. (2017). STUDI IDENTIFIKASI KERUSAKAN WILAYAH PESISIR DI KABUPATEN MUKOMUKO PROVINSI BENGKULU. JURNAL ENGGANO, 2(2).
Hardiyatmo, H. C., "Mekanika Tanah II" edisi 6, Yogyakarta, Gadjah Mada University Press, 2018.
Indriasari, V. Y., Risandi, J. and Akhwady, R., "Karakteristik Dan Daya Dukung Tanah Untuk Struktur Perlindungan Pantai Di Pantai Kedungu, Kabupaten Tabanan Provinsi Bali" Jurnal Teknik Sipil Universitas Syiah Kuala, vol. 5, no. 3, pp. 251-258, 2018.
Indriasari, V. Y., Risandi, J. and Akhwady, R., "Analysis Of Revetment Construction Stability In Kedungu Beach, Tabanan Bali", Jurnal Sumber Daya Air, vol. 13, no. 1, pp. 11-11, 2017, Doi:10.31028/jsda.v13.i1.11-22.
