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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences JGE (Jurnal Geofisika Eksplorasi) Jurnal Geocelebes Jurnal Pengabdian Masyarakat Indonesia
Hendrawan, Rezki Naufan
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Humanities Earth & Planetary Sciences Education Engineering Public Health Social Sciences

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GIS-based Geospatial Risk Modeling of Extreme Waves and Abrasion on the West Coast of Sumatra Simarmata, Nirmawana; Wijayanti, Goldie Melinda; Nadzir, Zulfikar Adlan; Al Farishi, Bilal; Hendrawan, Rezki Naufan
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 30, No 3 (2025): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.30.3.411-424

Abstract

Indonesia, with its second-longest coastline in the world, is vulnerable to coastal disasters such as extreme waves and coastal abrasion. Pesisir Barat Regency in Sumatra is one of the regions that is vulnerable to these threats. Extreme waves, although rarely occur because of tropical cyclones, can be triggered by the influence of cyclones in the Indian Ocean. In addition, coastal abrasion caused by the interaction of waves, currents, and winds is increasingly threatening coastal areas. This research aims to identify the risk of extreme waves and abrasion disasters in Pesisir Barat Regency using a research-based approach to Geographic Information Systems (GIS) and multi-criteria analysis. Data on marine hydrodynamics, coastal topography, and land cover conditions are integrated to produce disaster risk maps. The risk analysis results show that the Ngaras sub-district and several other sub-districts, such as Bangkunat, Lemong, and Ngambur, have a high level of risk, with a total risk area reaching 0.398 square kilometers (km2). Meanwhile, most other sub-districts are in the low-risk class. Key factors influencing the risk level include coastal topography, vegetation cover, and the intensity of human activities in coastal areas. This study highlights the importance of coastal zone management based on risk mitigation and the need to protect coastal ecosystems to reduce disaster impacts. The findings are expected to serve as a reference for disaster mitigation policy planning in Pesisir Barat and other coastal areas. Additionally, these results could be utilized to develop holistic and practical disaster reduction effort by related stakeholders and coastal communities.
Kerentanan dan Kapasitas Kabupaten Lampung Selatan dalam Menghadapi Ancaman Bencana Hendrawan, Rezki Naufan; Hilman, Zaki; Widiatama, Angga Jati; Al Farishi, Bilal; Zainuddin, Ahmad Dennil; Ayunda, Marsya
Jurnal Pengabdian Masyarakat Indonesia Vol 4 No 3 (2024): JPMI - Juni 2024
Publisher : CV Infinite Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jpmi.2179

Abstract

Kabupaten Lampung Selatan merupakan salah satu kabupaten yang terletak di ujung tenggara Provinsi Lampung. Berdasarkan Indeks Risiko Bencana Indonesia tahun 2021 diketahui bahwa Kabupaten Lampung Selatan memiliki indeks risiko bencana sedang yang meliputi ancaman bencana tinggi seperti gempabumi, tsunami, dan banjir. Tingkat risiko tentunya dipengaruhi bukan hanya tingkat bahaya bencana, tetapi dipengaruhi oleh kerentanan daerah dan kesiapsiagaan masyarakat setempat. Oleh karena itu, penting untuk dilakukan penilaian kerentanan dan kapasitas di Kabupaten Lampung Selatan untuk mengetahui seberapa besar potensi pengurangan tingkat risiko bencana. Penilaian Kerentanan dan Kapasitas Bencana di Kabupaten Lampung Selatan secara umum dikerjakan dengan berbasis sistem informasi geografis dan juga pemetaan sosial. Data informasi geografis diolah dengan metode fuzzy logic dengan tiga kelas pembobotan yakni rendah, sedang, dan tinggi sedangkan pemetaan sosial dilakukan dengan penilaian berbasis kuesioner yang diambil dari beberapa sampel masyarakat. Pengolahan data kerentanan mengacu kepada modul analisis kerentanan bencana dari turunan Perka BNPB No. 2 Tahun 2012. Berdasarkan hasil penilaian kerentanan dan kapasitas, diketahui bahwa Kecamatan Rajabasa memiliki urgensi untuk diproiritaskan dalam peningkatan kapasitas masyarakat.
Study of the Digital Geological Compass in Increasing the Effectiveness and Efficiency of Measuring Geological Structure Data in the Field Hendrawan, Rezki Naufan; Irsyad, Muhammad; Gunawan, Aditya; Zainuddin, Ahmad Dennil; Widiatama, Angga Jati
JURNAL GEOCELEBES Vol. 8 No. 2: October 2024
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/geocelebes.v8i2.36276

Abstract

This study compares the use of analog geological compasses and digital geological compasses in measuring fracture planes on crystalline rocks at the Lampung region. The measurement results demonstrate that using digital compasses yields higher time efficiency than analog compasses, with a reduction in measurement duration of over 50%. Although the dominant directions of the fracture planes were similar between the two methods, the inclination values and accuracies of each plane were not always consistent. Data processing using rose diagrams and stereonets indicates that the RockD application provides comparable results to measurements obtained using analog compasses. Therefore, the use of digital compass applications such as RockD can serve as an efficient alternative for geologists in collecting field data related to rock fractures, particularly in the context of quantitative data. However, analog geological compass is still recommended for measuring planes with on single-plane characteristics, such as rock bedding and fault mirrors. This study demonstrates the potential for development and transformation from analog geological compasses to digital geological compasses, and further research is needed to investigate the minimum number of fractures that can be measured with a digital geological compass to be considered statistically valid.
GEOMORPHIC INDICES AND FAULT SEGMENTATION INDICATION OF MENANGA FAULT AT PESAWARAN, LAMPUNG Hendrawan, Rezki Naufan; Draniswari, Windi Anarta; Bakhtiar, Agim Yustian; Widiatama, Angga Jati
JGE (Jurnal Geofisika Eksplorasi) Vol. 9 No. 3 (2023)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v9i3.287

Abstract

Remote sensing and GIS are playing important roles in geomorphology and hazard risks analysis. Pesawaran area located near the Menanga Fault and recently on the risk of earthquake that happened along this fault.  Thus, it is essential to investigate the area actively affected by Menanga Fault as preliminary research about hazard risk related to Menanga Fault. The morphometry method based on DEMNAS and Landsat 8 was applied to evaluate the zone affected by Menanga Fault, and fracture data analysis was conducted to consider the possibility of fault segmentation resulting from its mechanism. The study area can be divided into 3 zones; zone A is greatly affected by Menanga Fault activity, zone B is affected by Menanga Fault and Mt. Pesawaran development, and zone C is tectonically less affected. Zone A landforms were not only formed as a result of Menanga Thrust fault but also the strike-slip fault segment.  Fault segmentation exists in this zone with different mechanisms (strike-slip and dip-slip), producing lineaments with different trends, and differentiation of river patterns.
Co-Authors Aditya Gunawan, Aditya Al Farishi, Bilal Ayunda, Marsya Bakhtiar, Agim Yustian Draniswari, Windi Anarta Hilman, Zaki Muhammad Irsyad Nadzir, Zulfikar Adlan Simarmata, nirmawana Widiatama, Angga Jati Wijayanti, Goldie Melinda Zainuddin, Ahmad Dennil