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All Journal International Journal of Research in Community Services Indonesian Journal of Oceanography Bulletin of Geology
Anwar, Iwan Pramesti
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Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Social Sciences Other

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Analisis Parameter Laut-Atmosfer terhadap Anomali Tinggi Muka Air di Laut Jawa Anwar, Iwan Pramesti; Setiawan, Agus; Herho, Sandy H. S.; Atmojo, Aulia Try; Khadami, Faruq
Indonesian Journal of Oceanography Vol 6, No 4 (2024): Indonesian Journal of Oceanography
Publisher : University of Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/potensi.%Y.24645

Abstract

Kenaikan permukaan air laut merupakan ancaman serius di kawasan pesisir, khususnya di kota-kota pelabuhan seperti Jakarta, Semarang, dan Surabaya yang terletak di Laut Jawa. Penelitian ini bertujuan untuk menganalisis interaksi antara anomali tinggi muka air laut dari data satelit Altimetri AVISO, suhu permukaan laut, dan faktor oseanografi serta atmosfer lainnya. Peningkatan suhu permukaan laut akibat variasi iklim berkontribusi pada ekspansi termal air laut, yang pada gilirannya meningkatkan rata-rata tinggi muka air laut. Dinamika perairan yang menyebabkan anomali tinggi muka air laut secara spasial, dipengaruhi oleh pola musim dan fenomena seperti ekman transport, teramati berperan penting dalam redistribusi suhu permukaan air laut. Puncak anomali tinggi muka air laut terjadi pada bulan Mei, dengan tinggi anomali mencapai +0,2 m, yang bersamaan dengan suhu air laut sebesar 32°C dan transport ekman ke arah selatan. Sehingga, secara spasial anomali tinggi muka air lebih tinggi di pantai utara Pulau Jawa. Hasil analisis menunjukkan bahwa anomali tinggi muka air laut berkorelasi positif dengan suhu permukaan laut. Melalui analisis Principal Component Analysis (PCA), ditemukan bahwa dua komponen utama (F1 dan F2) menyumbang total 78,47% dari variabilitas data, dengan F1 menjelaskan 58,86% dan F2 menjelaskan 19,61%. Hubungan antara suhu permukaan laut dan anomali tinggi muka air laut tercermin pada vektor yang lebih panjang, menunjukkan pengaruh signifikan kedua variabel ini terhadap dinamika laut. Temuan penelitian ini memberikan wawasan penting untuk pengelolaan sumber daya kelautan dan strategi penanggulangan dampak variasi iklim yang lebih efektif di wilayah pesisir.
NUMERICAL SIMULATION OF THE 2018 KRAKATAU TSUNAMI GENERATED BY FLANK COLLAPSE AND ASESSMENT OF TSUNAMI HEIGHT IN PANDEGLANG REGENCY Latief, Hamzah; ISNAENI, KHOLILLAH YUDICIA; PUTRI, MUTIARA RACHMAT; FAIZIN, HAEKAL YUSRIL; DIASTOMO, HANIF; Anwar, Iwan Pramesti
Bulletin of Geology Vol 7 No 1 (2023): Bulletin of Geology
Publisher : Fakultas Ilmu dan Teknologi Kebumian (FITB), Institut Teknologi Bandung (ITB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/bull.geol.2023.7.1.4

Abstract

This study aims to reconstruct the tsunami event on December 22, 2018, due to the eruption of Anak Krakatau Volcano, which caused a flank collapse and generated an underwater landslide. Then this landslide caused a tsunami that impacted the coast of the Sunda Strait, especially on the coast of Pandeglang Regency. Based on satellite imagery, it is known that the landslide source came from the southwestern part of Anak Krakatau's wall moving down the former caldera wall of the 1883 Krakatau volcanic eruption. The mount grew again and was known as Anak Krakatau Volcano and appeared above sea level in 1929 and continued to grow. Subsequently, several eruptions spewed sediment deposits that had accumulated on the edges and foot of the mount. These sediments increased and became unstable, causing flank collapse and triggering underwater landslides. Several simulation scenarios have been carried out to obtain the best model that can represent the 2018 Anak Krakatau Tsunami with landslide parameters, namely: the volume of the landslide is 0.276 km3, the duration of propagation is 410 seconds, the inclination angle is 8.2°, and the length of the landslide trajectory is 3435 meters. The waveform generated as a tsunami source is in the form of wave peaks in the direction of the slide and wave valleys on the back of the slide. Furthermore, this wave propagated in all directions but primarily focused on the southwest, i.e., Panaitan Island and Pandeglang Regency. Tsunami simulations show that the tsunami reached: Panaitan Island and Pandeglang Regency at 58-60 minutes, Kota Agung (Lampung) at 42 minutes, and Ciwandan (Banten) at 46 minutes after the landslide with a tsunami height of 5.01m, 0.9 m, and 0.7 m respectively, with a maximum tsunami wave height of 18.6 m on Panaitan Island. Furthermore, it is known that five areas in Pandeglang Regency fall into the high tsunami hazard category with a tsunami height of more than 3 m, namely Panaitan Island, Ujungkulon District, Sumur, Panimbang, and Labuhan. By accurately knowing the distribution of tsunami height and estimating the time of arrival of the tsunami in the affected area and the inundation area, an early warning system and mitigation efforts can be planned, such as spatial planning and other actions. Key words: Anak Krakatau tsunami, numerical simulation, flank collapse, underwater landslide, Pandeglang Regency
Analyzing Benthic Distribution and Public Infrastructure to Support Tourism Zoning on Tunda Island Subiyanto; Abdurrahman, Umar; Khadami, Faruq; Anwar, Iwan Pramesti
International Journal of Research in Community Services Vol. 6 No. 3 (2025): International Journal of Research in Community Service (IJRCS)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v6i3.629

Abstract

This study presents a comprehensive analysis of benthic habitat distribution and public infrastructure on Tunda Island, aimed at developing effective tourism zoning strategies. By integrating high-resolution spatial data derived from field surveys and remote sensing technologies, including multispectral imagery and Geographic Information System (GIS) methodologies, the research delineates distinct zones optimal for diverse tourism activities. The findings indicate that the southern and southeastern parts of the island, characterized by sandy substrates and proximity to resorts and docks, are well-suited for intensive tourism. Conversely, the northern and northwestern regions, dominated by coral and rocky substrates, are proposed for conservation-oriented educational tourism due to their rich biodiversity. The research also highlights the potential of community-based tourism facilitated by existing public infrastructure such as schools and mosques, which supports local engagement in tourism development. The resultant zoning map serves as a vital tool for local authorities and stakeholders in Tunda Island, guiding sustainable tourism management practices that value ecological integrity and community involvement. This study underscores the importance of interdisciplinary approaches in ecological monitoring and tourism planning, contributing to the broader discourse on sustainable practices in small island contexts
Co-Authors Abdurrahman, Umar Agus Setiawan Atmojo, Aulia Try Diastomo, Hanif FAIZIN, HAEKAL YUSRIL Hamzah Latief Herho, Sandy H. S. Isnaeni, Kholillah Yudicia Khadami, Faruq Putri, Mutiara Rachmat Subiyanto