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All Journal JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) Majalah Ilmiah Pengkajian Industri
Widjo Kongko
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Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Engineering Environmental Science Industrial & Manufacturing Engineering Transportation

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Jejak tsunami 25 Oktober 2010 di Kepulauan Mentawai berdasarkan penelitian kebumian dan wawancara Yudhicara Yudhicara; Widjo Kongko; Velly Asvaliantina; Suranto Suranto; Sapto Nugroho; Andrian Ibrahim; Widodo S. Pranowo; Nils B. Kerpen; Knut F. Kramer; Oliver Kunst
Jurnal Lingkungan dan Bencana Geologi Vol 1, No 3 (2010)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4740.995 KB) | DOI: 10.34126/jlbg.v1i3.19

Abstract

SARITsunami Mentawai yang terjadi pada 25 Oktober 2010 adalah kategori tsunami earthquake. Ciri dari kategori ini, antara lain guncangan gempa bumi terasa lemah tetapi berlangsung lama (~ 3 menit) dan menghasilkan tsunami cukup besar. Parameter tsunami yang terukur di lapangan, diketahui bahwa ketinggian run up maksimum 12,4 m di Pulau Sibigou, jarak genangan maksimum 450 m di Dusun Malakopa, kedalaman batimetri dekat pantai 2-15 m, dan ketebalan endapan pasir tsunami mencapai 12cm di Teluk Makaroni. Berdasarkan keterangan dari saksi mata, sebelum tsunami berlangsung indikasinya adalah suara gemuruh dari arah laut dan perilaku burung camar yang mengeluarkan suara yang gaduh. Gelombang tsunami tiba di pantai 5-10 menit setelah guncangan gempa bumi sebanyak 3 sampai 4 kali gelombang. Gelombang yang kedua dianggap paling tinggi.Kata kunci: gempa bumi, Tsunami Mentawai, ketinggian run up, jarak genanganABSRACTTsunami Mentawai of 25 October 2010 is take in to tsunami earthquake catagory, which has weak shaking and slow duration (~ 3 minutes), but produce big tsunami. Tsunami parameter measurement obtained the maximum run up of 12.4 meters at Sibigou Island, maximum inundation of 450 meters at Malakopa Village, near coast bathymetry of 2-15 meters and tsunami sand deposits up to 12 cm at Makaroni Bay. According to the eyewitnesses, there are some precursors such as roaring sound from the sea and bird noisy sounds heard before the tsunami came. Tsunami arrived 5-10 minutes after earthquake, come inland about 3 to 4 times and the second wave was the highest.Keywords: earthquake, Tsunami Mentawai, run up, inundation
STUDY OF DIKE EFFECTS TO CONTROL SEDIMENTATION PROCESS ON PATIMBAN'S PORT PLAN USING COMPUTATION MODELING Mardi Wibowo; Widjo Kongko
Majalah Ilmiah Pengkajian Industri Vol. 12 No. 2 (2018): Majalah Ilmiah Pengkajian Industri
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v12i2.2567

Abstract

The development of the international port of Patimban in Subang is very urgent. The port is expected to support the Tanjung Priok port in Jakarta which is unable to meet the loading and unloading needs of business operators, especially in West Java. In port development planning one of the main problems of physical chemical aspects is sedimentation and erosion process. The purpose of this modeling is to know the sedimentation and erosion pattern around the location plan of port development. The result of modeling is expected to be the initial consideration in designing the Patimban Port. Modeling of sediment transport is done by using MIKE21 Sand Transport module software by entering geophysical data of field survey result such as bathymetry, sea level, river flow and characteristic of existing sediment. Modeling is done both in west season and east season for 1 year (October 2016-September 2017). Based on the result of point extraction on the modeling result, it is known that the influence of dike significantly reduces the bed level change in the harbor channel about 46.45 - 82.28% (for dike 2 m) and about 55.01 - 88.94% (for dike 4 m). While, based on the result of the area extraction, it is known that the influence of the dike on the bed level change in the harbor channel is significant, that is to decrease the average of bed level change by 77.58% (for dike 2m) and 81.02% (for dike 4m).
Co-Authors Andrian Ibrahim Knut F. Kramer Mardi Wibowo Nils B. Kerpen Oliver Kunst Sapto Nugroho Suranto Suranto Velly Asvaliantina Widodo S. Pranowo Yudhicara Yudhicara