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All Journal Indonesian Journal of Geography BERKALA FISIKA Bulletin of Scientific Contribution : Geology Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Neutrino : jurnal fisika dan aplikasinya Jurnal Fisika FLUX Communications in Science and Technology Jurnal Teras Fisika : Teori, Modeling, dan Aplikasi Fisika Jurnal Pengabdian Masyarakat Indonesia Jurnal Serambi Abdimas Aceh International Journal of Science and Technology
Sehah Sehah
Jurusan Fisika, Fakultas MIPA, UNSOED, Jalan Dr. Suparno 61 Purwokerto
Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Public Health Social Sciences

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Pemodelan inversi data anomali gravitasi satelit untuk mengestimasi keberadaan dapur magma komplek gunungapi Sindoro-Sumbing, Jawa Tengah, Indonesia Sehah, Sehah; Mutaabidah, Insyahita Akmalia; Irayani, Zaroh
Jurnal Teras Fisika: Teori, Modeling, dan Aplikasi Fisika Vol 8 No 1 (2025): Jurnal Teras Fisika: Teori, Modeling, dan Aplikasi Fisika
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jtf.2025.8.1.15544

Abstract

Pemodelan inversi tiga dimensi (3D) telah dilakukan untuk memodelkan struktur geologi dapur magma pada komplek Gunungapi Sindoro dan Sumbing. Data yang digunakan adalah data anomali gravitasi satelit resolusi tinggi dari Global Gravity Model Plus (GGMplus) di daerah penelitian dengan luas 423,81 km2. Hasil pengaksesan data GGMplus adalah data gravity disturbance dengan nilai yang berkisar 69,44 – 299,01 mGal. Data telah diolah dengan menerapkan koreksi Bouguer untuk memperoleh data Anomali Bouguer Sederhana (ABS) dan koreksi terrain untuk memperoleh data Anomali Bouguer Lengkap (ABL). Selanjutnya reduksi data ke bidang datar dilakukan dengan menggunakan aproksimasi Deret Taylor, kemudian dilakukan pemisahan data anomali regional dan residual dengan menggunakan metode upward continuation. Pemisahan data anomali tersebut menghasilkan data anomali residual dengan rentang nilai -74,96 – 29,05 mGal. Hasil pemodelan inversi 3D pada data anomali residual menunjukkan blok anomali rendah dengan nilai densitas berkisar 1,50 ~ 1,59 g/cm3, yang terletak pada posisi geografis 109.989° BT dan -7.304° LS dengan kedalaman sekitar 1 – 5 km, diinterpretasikan sebagai dapur magma Gunungapi Sindoro. Hasil pemodelan juga menunjukkan blok anomali rendah pada posisi geografis 110.071° BT dan -7.385° LS dengan kedalaman berkisar 1 – 6 km, yang diinterpretasikan sebagai dapur magma Gunung Sumbing.
Hydrostratigraphic Model Analysis Based on Rock Resistivity Data in the Purbalingga Regency Area, Central Java, Indonesia Sehah, Sehah; Aziz, Abdullah Nur; Pulo Boli, Lusia Silfia; Addailamy, Faizah Ayu; Anas, Almas Atilya Aini; Mubarak, Fuad
Indonesian Journal of Geography Vol 57, No 3 (2025): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.104992

Abstract

The availability of groundwater for irrigation in Purbalingga Regency, requires significant attention since the region has an extensive rice field, necessitating systematic groundwater exploration and the implementation of appropriate management strategies. A geoelectrical resistivity survey has been conducted to investigate groundwater resources and to construct a hydrostratigraphic model that facilitates the interpretation of hydrogeological conditions, including aquifer distribution, groundwater depth, and productive zones. Resistivity data were collected from 16 points distributed across the districts of Kalimanah, Purbalingga, Kemangkon, and Bukateja. The correlation of resistivity logs produced detailed hydrostratigraphic cross-sections, illustrating lithological variations, layer thicknesses, and aquifer distribution. Interpretation down to a depth of 200 m identified two major formations: the Alluvium Formation and the Terrace Formation. The Alluvium Formation, consisting of sandy clay, sand, and clayey sand, exhibits resistivity values ranging from 0.87 to 69.43 Ωm, whereas the Terrace Formation, composed of tuffaceous sandstone, sand, conglomerate, and tuff, with resistivity values between 7.81 and 38.09 Ωm. Hydrostratigraphic modeling indicates that aquifer productivity varies across the study area. Kalimanah District, dominated by low-resistivity deposits (0.87–8.55 Ωm), is interpreted as having the highest aquifer productivity, making it particularly suitable for the development of groundwater-based irrigation. This study introduces a resistivity-based interpretative approach to classify hydrostratigraphic characteristics by correlating resistivity values with local geological conditions.
Co-Authors Abdullah Nur Aziz Abdullah Nur Aziz Addailamy, Faizah Ayu Afwa, Ulil Anas, Almas Atilya Aini Ardhana Reswara P.A. Arya Dwi Candra Chandra Adi Prasetyo, Chandra Adi Dwi Kartika Ferdiyan, Akmal Hartono Hartono Hasby, Esa Pallewi Ikhwana, Aina Zahra J. Aminuddin Maghfiroh, Fatkhiyatul Mubarak, Fuad Mutaabidah, Insyahita Akmalia Prabowo*, Urip Nurwijayanto Priyadi, Pujo Pulo Boli, Lusia Silfia Sa'adah, Fajar Nur Sugito - Sukmaji Anom Raharjo Sunardi Sunardi Urip Nurwijayanto Prabowo, Urip Nurwijayanto Utami, Aviyatna Fikri Zaroh Irayani