ANALYSIS OF LONGSHORE CURRENT AND LONGSHORE SEDIMENT TRANSPORT AT AENG BEACH, NORTH GALESONG, TAKALAR REGENCY
Article Sidebar
-
breaking waves, current, erosion, longshore, sedimentation, waves
Abstract
Located in the coastal region of Takalar Regency, Aeng Beach has possibilities for tourism, industrial, fishing, and seaweed industries. It shares a straight border with Makassar City. But practically all coastal regions have the issue of abrasion along the Takalar Regency's shore as a result of coastal currents. Investigating the direction and speed of longshore currents and their impact on the movement of silt down the shore is the goal of this study. Based on ten years of wind data from BMKG Region IV Makassar City, wave data analysis employs a wave forecasting technique. Empirical equations are used to calculate longshore current speed and longshore sediment transport. Based on the analysis, it can be observed that the breaking wave depth (db) varies between 2.1 and 2.5 meters, while the breaking wave height (Hb) ranges from 1.64 to 2.00 meters. The longshore current direction of the coast is east to west, and the speed ranges from 4.13 to 4.55 m/sec. According to the direction of the dominant incoming waves, the longshore sediment transport ranges from 13,159.93 – 19,674.25 m3/day or 4,803,373 – 7,181,101 m3/year from west to east. This indicates that fine sand to coarse sand dominates the sediment in the Aeng Beach area. Aeng Village Beach's abrasion management can be determined using the research findings as reference data. One of the structural treatments that can be implemented is the construction of permeable groin structures, which can regulate the quantity of sediment carried down the shore and preserve the stability of the coastline.
References
Dean & Dalrymple. 2002. Coastal Processes with Engineering Applications, Cambridge University Press, USA.
Dauhan, S.K., H. Tawas, H. Tangkudung & J.D. Mamoto. 2013. Analisis karakteristik gelombang pecah terhadap perubahan garis pantai di Atep Oki. Jurnal Sipil Statik, 1(12): 784-796. https://ejournal.unsrat.ac.id/index.php/jss/article/view/3866
Komar, P.D. 1979. Beach-Slope Dependence of Longshore Currents. Jour. Waterway, Port, Coastal and Ocean Div., ASCE, 105(4): 460-464. https://doi.org/10.1061/JWPCDX.0000169.
Kristanto, O., A. Ismanto, A. Satriadi, H. Setiyono, & W. Atmodjo. 2022. Analisis longshore current dan pengaruhnya terhadap transpor sedimen dasar di Perairan Teluk Awur, Jawa Tengah. Indonesian Journal of Oceanography (IJOCE), 4(1): 59-68. https://doi.org/10.14710/ijoce.v4i1.13163
Lubis, A.M., N. Veronica, R. Saputra, J. Sinaga, M. Hasanuddin, & E. Kusmanto. 2020. Investigasi arus sejajar pantai (Longshore Current) di Daerah Abrasi Bengkulu Utara. Jurnal Kelautan Tropis, 23(3): 316-324. https://doi.org/10.14710/jkt.v23i3.8045
Longuet-Higgins & Stewart. 1964. Radiation stresses in water waves. A physical discussion, with applications, Deep Sea Research, 11(4): 529-562. https://doi.org/10.1016/0011-7471(64)90001-4
Longuet-Higgins. 1970. Longshore Currents Generated by Obliquely Incident Sea Waves,1. Journal of Geophysical Research, 75(33): 6778-6789. https://doi.org/10.1029/JC075i033p06778
Longuet-Higgins. 1970. Longshore Currents Generated by Obliquely Incident Sea Waves,2, Journal of Geophysical Research, 75(33): 6790-6801. https://doi.org/10.1029/JC075i033p06790
Melisa, W., Hariyadi., S. Widada, E. Indrayanti, D.N. Sugianto, D.H. Ismunarti, & M. Yusuf. 2020. Studi pengaruh longshore current terhadap abrasi di Pantai Moro, Kabupaten Kendal, Jawa Tengah. Indonesian Journal of Oceanography, 02(04): 324-333. https://doi.org/10.14710/ijoce.v2i4.8530
Naufalina, N. E., J. Marwoto & B. Rochaddi. 2022. Analisis sebaran sedimen berdasarkan ukuran butir di perairan Pantai Baron, Kabupaten Gunungkidul, Yogyakarta. Indonesian Journal of Oceanography, 4(2): 61-67. https://doi.org/10.14710/ijoce.v4i2.13934
Prasetyo, F.A., T. Rachman & C. Paotonan. 2020. Identifikasi kerusakan pantai kawasan pesisir Kecamatan Galesong Utara, Kabupaten Takalar, Sulawesi Selatan. SENSISTEK Riset Sains dan Teknologi Kelautan, 3(1): 26-31. https://doi.org/10.62012/sensistek.v3i1.13236
Pratama, D.P., W. Atmodjo & A. Wirastriya. 2023. Pengaruh arus sejajar pantai (Longshore Current) terhadap proses perubahan garis pantai di Pantai Marunda, Jakarta Utara. Indonesian Journal of Oceanography, 05(02): 108-117. https://doi.org/10.14710/ijoce.v5i2.16198
Rizal, N.F.T., T. Jansen & A.H. Thambas. 2021. Perencanaan pemecah gelombang (breakwater) di daerah pantai Desa Saonek Kabupaten Raja Ampat Provinsi Papua Barat. Jurnal Sipil Statik, 9(4): 717-724. https://ejournal.unsrat.ac.id/v2/index.php/jss/article/view/39046
Risnawati. 2021. Arahan pemanfaatan lahan di pesisir pantai Galesong Utara Kabupaten Takalar. Teknosains Media Informasi Sains dan Teknologi, 15(3): 258-271. https://doi.org/10.24252/teknosains.v15i3.20261
Syam, A.L., S. Wunas & W.W. Osman. 2018. Kesesuaian lahan permukiman di wilayah Peisisir Kecamatan Galesong Utara, Kabupaten Takalar. Jurnal Wilayah dan Kota Maritim, 6(1): 54-62. https://doi.org/10.20956/jwkm.v6i1.1317
Triatmodjo, B. 1999. Teknik Pantai, Beta Offset, Yogyakarta.
USACE. 2003. Coastal Engineering Manual, Washington, D.C.
Umar, H. 2015. Desain Struktur Groin Permeable. Leutika Prio, Yogyakarta. ISBN 978-602-371-237-3 : 70.
Umat, H., S. Rahman, C. Paotonan, & A.Y. Baeda. 2019. The effect of pole density on permeable groin due to controlling longshore current. The 5th International Symposium on Material, Mechatronics and Energy, IOP Conf. Series: Materials Science and Engineering ,619 (2019): 012005. https://doi.org/10.1088/1757-899X/619/1/012005
Umar, H., T. Rachman, S. Rahman, C. Paotonan, A.Y. Baeda, Taufiqurrahman & I. Alkhaer. 2021. Analisis ukuran butiran sedimen pantai Desa Aeng Kabupaten Takalar dan Pantai Padongko Kabupaten Barru. Jurnal Zona Laut, 2(1): 16-20. https://doi.org/10.20956/zl.v1i1.9653
Authors
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
The author submitting the manuscript must understand and agree that the copyright of the article manuscript must be submitted/transferred to the Jurnal Ilmu dan Teknologi Kelautan Tropis. This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA) International License in which the Author and Reader can copy and redistribute the material in any media or format, and remix, modify and build material for any purpose, but they must provide appropriate credit (citing articles or content), provide a link to the license, and indicate whether there is a change. If you mix, change, or create material, you must distribute your contribution under the same license as the original.