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All Journal Jurnal Ilmu Lingkungan IJOG : Indonesian Journal on Geoscience
Hamdani, Agus Jaiz
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Earth & Planetary Sciences Environmental Science

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Analisis Kerawanan Longsor dengan Metode Analytical Hierarchy Process dan Information Value di Kecamatan Lembang–Kabupaten Bandung Barat Hamdani, Agus Jaiz; Rahmawati, Zulfa Yogi; Priyana, Pandu Eka; Zen, Revina Fitri; Suhartono, Muhammad Alsamtu Tita Sabila Pratama; Mandiri, Ashilah Putri; Puspita, Salma Maya; Fitriawan, Muhammad Bagus; Ahsan, Najmadina Faradiba; Setiawan, Fitri Hanifah; Hanif, Muhammad Hafidz Abdul
Jurnal Ilmu Lingkungan Vol 23, No 5 (2025): September 2025
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.23.5.1253-1268

Abstract

Kecamatan Lembang merupakan salah satu daerah yang sering dilanda bencana tanah longsor. Kejadian longsor di daerah tersebut tidak jarang menimbulkan kerugian ekonomi dan korban jiwa. Sejauh ini, belum ada satupun penelitian yang membandingkan metode pemetaan kerawanan tanah longsor, misalnya analytical hierarchy process (AHP) dan information value (IV), di daerah tersebut. Oleh karena itu, penelitian ini bertujuan (1) memetakan dan menganalisis distribusi spasial tingkat kerawanan longsor dan (2) membandingkan serta menganalisis metode AHP dan IV untuk kajian kerawanan longsor di Kecamatan Lembang. Sebanyak delapan parameter kerawanan longsor digunakan dalam pemetaan, seperti ketinggian, kemiringan lereng, arah hadap lereng, jarak terhadap patahan, jarak terhadap sungai, jarak terhadap jalan, litologi, dan penggunaan lahan. Semua parameter tersebut kemudian ditumpangsusunkan (overlay) sehingga menghasilkan peta kerawanan tanah longsor. Hasil peta kerawanan tersebut kemudian dibagi menjadi 5 kelas: sangat rendah, rendah, sedang, tinggi, dan sangat tinggi. Uji akurasi juga dilakukan terhadap kedua metode pemetaan. Metode IV memiliki akurasi yang lebih tinggi daripada metode AHP dengan nilai 68% berbanding 56%. Pola kelas kerawanan tinggi dan sangat tinggi di kedua peta tersebut berasosiasi dengan hutan dan jaringan sungai. Selain itu, analisis ini juga menunjukkan kualitas data parameter dan ketersediaan basis data kejadian penting untuk menghasilkan peta yang lebih representatif.
Enhancing Preliminary Database of Volcanic Debris Avalanches in Indonesia: A Focus on Morphological Type and Geological Data Malawani, Mukhamad Ngainul; Hamdani, Agus Jaiz; Abidin, Imam Alief Naufal; Estiono, Meru Sigit; Pratiwi, Dinda; Lavigne, Franck; Handayani, Tiara; Suhendro, Indranova
Indonesian Journal on Geoscience Vol. 13 No. 1 (2026)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.13.1.1-11

Abstract

Indonesia has many cases of volcanic debris avalanche (VDA), which is fifty-four events from the inventory conducted by MacLeod (1989). However, data on the characteristics of VDA provided is limited, therefore it is necessary to develop detailed information related to these fifty-four cases. This study focuses on morphological and geological inventory of the VDA in Indonesia. Using the DEM database, morphological features were analyzed and four classes were determined, namely (1) volcanoes with horseshoe-shaped scar only; (2) volcanoes with no horseshoe-shaped scar, but has DAD (debris avalanche deposit); (3) volcanoes with no horseshoe-shaped scar, and no DAD; and (4) volcanoes with horseshoe-shaped scar and with DAD. Most of the volcanoes that have VDA are clustered in the first class. From the geological map, three main main pieces of information can be obtained: relative age, rocks/materials, and structure. Of fifty-four reported VDA events, the age of the rocks build the volcano that commonly ranges the Pliocene, Pleistocene, and Holocene. The composition material is relatively uniform, consisting of lava with basalt-andesite rock types. Scar structures are also delineated in some volcanoes. Based on these characterization results, its relationship with volcano types in Indonesia (e.g. type A, B, C) was analyzed to determine the potential for reoccurrence of VDA. Further analysis is proposed, along with a more comprehensive characterization of the VDA in Indonesia, particularly at the type A volcanoes, such as Dempo, Galunggung, Gede, Papandayan, Sundoro, and Raung.
Co-Authors Abidin, Imam Alief Naufal Ahsan, Najmadina Faradiba Estiono, Meru Sigit Fitriawan, Muhammad Bagus Franck Lavigne, Franck Hanif, Muhammad Hafidz Abdul Malawani, Mukhamad Ngainul Mandiri, Ashilah Putri Pratiwi, Dinda Priyana, Pandu Eka Puspita, Salma Maya Rahmawati, Zulfa Yogi Setiawan, Fitri Hanifah Suhartono, Muhammad Alsamtu Tita Sabila Pratama Suhendro, Indranova Tiara Handayani Zen, Revina Fitri