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Groundwater Table Identification Using the Microtremor Horizontal-to-Vertical Spectral Ratio (HVSR) Method in Muara Bangkahulu District Maulana, M Ridho; Hadi, Arif Ismul; Refrizon, Refrizon; Putri, Kholiffa Juliana Eka
Jurnal Fisika Unand ##issue.vol## 15 ##issue.no## 4 (2026)
Publisher : Universitas Andalas

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Abstract

Muara Bangkahulu District, Bengkulu City, is predominantly composed of unconsolidated sediments with geological characteristics that may influence aquifer distribution and groundwater table depth. This study aims to estimate groundwater conditions and identify subsurface characteristics based on the Vp/Vs ratio and Poisson’s ratio using the Horizontal-to-Vertical Spectral Ratio (HVSR) microtremor method. Measurements were conducted at 34 observation points using a portable short-period seismograph and were complemented by groundwater table depth measurements from local residents’ wells using a digital laser distance meter. Data processing was performed using Geopsy, HV-Inv, and Surfer software to produce two-dimensional subsurface cross-sections and spatial distribution maps of the analyzed parameters. The results indicate variations in Vp/Vs and Poisson’s ratio values that reflect differences in lithological compaction, porosity, and groundwater saturation. Higher parameter values indicate the presence of water-saturated unconsolidated sediments, which are interpreted as weak zones associated with shallow groundwater conditions. The areas of Kandang Limun and Pematang Gubernur exhibit relatively high parameter values, suggesting the presence of shallow groundwater. These findings provide preliminary information on groundwater characteristics and may support regional development planning in Muara Bangkahulu District.
Co-Authors Abimayu, Dadin Mars Agung Satria, Lori Agustina, Tari Al Ansory, Andre Rahmat Al Rafly, Tegar Al-Ansory, Andre Rahmat Amalia, Isra Anggria, Della Cici Ansory, Andre Rahmat Al Apriana, Agnes Apriana, Yelda Apriyanti, Nurul Arif Ismul Hadi Arif Ismul Hadi Arsi, Sefti Dini Arya J Akbar Arya Putra Anggi Awaliyah, Isfardian Agustin Azhari, M. Fikri Azzahra, Gusti Ayu Zahwa Bernard, Admo Daniel, Adrian Darmawan Ikhlas Fadli Elfi Yuliza Fachri Faisal Fadli, Darmawan Ikhlas Falenia, Felly Farid*, Muchammad Farid, Muchammad Fauzi, M. Wilzam Febriansyah, Gian Ori Fikri, Muhammad Haikal Gumanty, Usman Halauddin Halauddin Halauddin Hanifah Maulani, Siti Hanipa, Rerisa Al Hardiansyah Hardiansyah Hardiansyah, Debi Harlianto, Budi Helinnes, Putri Henny Johan Herno Yudiansyah Hutasoit, Tegar Ashary Idris, Beni Syakban Ikhlas Fadli, Darmawan Irkhos Irkhos Isfardian Agustin Awaliyah Jaya, Shara Ashari Prana Jaya Kamal, Thomas Mustafa Kamila, Nur Husniatin Kausari, Alfata Khairul Amri Kusuma, Budi Praba Larang, Miranda Puspa Lindung Zalbuin Mase, Lindung Zalbuin M Farid Maesaroh, Rina Maesaroh Maghribi, Faritz Bagda Manurung, Yeni Sartika Maulana, M Ridho Misliniyati, Rena Muammar, Zaky Muhammad Dani Muhammad Farid Naldo, Asrol Nanang Sugianto Natasya, Indah Dwi Nazli, Khairun Nurhayati, Ratna Dewi Putri, Aisyah Cindy Phylia Putri, Elona Gita Gatra Putri, Kholiffa Juliana Eka Putri, Melly Zuhadjar Putriani, Eli Rabbani, M Rifqi Rafly, Tegar Al Rahmat Al-Ansory, Andre Rahmat, Andre Rahmawati, Nurul 'Ilmi Rahmawati, Nurul Ilmi Raihana, Hana Rida Samdara Sahputra, Rio Sapanur, Destika Meisy Saputri, Winda Saragih, Ronni Samuel Sholeha, Della Zakia Suaidi Ahadi Suhendra Suhendra Sumajaya, Erlan Sumanjaya, Erlan - Supriani, Fepy Suwarsono Suwarsono Syah, M. Taufiqqurahman Syaputra, Edo Win Sya’adah, Isni Taufiqurrahman Syah, Muhammad Tri Utami, Olga Triutami, Olga Yuni Setyowati Zakariya, Hilmi