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Identifikasi Bidang Gelincir Longsor Berdasarkan Metode Electrical Resistivity Tomography (ERT) di Desa Tolango, Kabupaten Gorontalo Utara Tya Ivanka Hiola; Ahmad Zainuri; Ronal Hutagalung
Journal of Applied Geoscience and Engineering Vol 4, No 2 : Desember 2025
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jage.v4i2.32373

Abstract

This study aims to analyze the geological conditions and landslide potential in Tolango Village, Anggrek District, North Gorontalo Regency. The research area is predominantly composed of two main lithological units: andesite and alluvial deposits. Field observations, petrographic analysis, and structural measurements were carried out to determine the geological characteristics. In addition, geoelectrical surveys using the Electrical Resistivity Tomography (ERT) method were conducted to interpret subsurface conditions. The results show that the upper layer (1.25–3.75 m) consists of clayey soil with low resistivity values (8.10–100 Ωm), while the lower layer (up to 15.9 m) is composed of andesite bedrock with higher resistivity values (101–7,600 Ωm). A potential slip surface was identified at the contact between these two layers, which becomes critical when water infiltration increases during the rainy season. Structural features such as thrust faults and joints were also observed, indicating tectonic influence on slope instability. Overall, the integration of geological and geophysical data confirms that the area is highly susceptible to landslides, particularly on steep slopes with impermeable clay-rich layers overlying resistant bedrock.
Geologi dan Analisis Pencemaran Logam Berat Menggunakan Indeks Geoakumulasi di Daerah Tulabolo Timur, Bone Bolango Nurmasita Dewi Sahido; Yayu Indriati Arifin; Ronal Hutagalung
Journal of Applied Geoscience and Engineering Vol 4, No 2 : Desember 2025
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jage.v4i2.37127

Abstract

The purpose this study is to assess geological conditions and levels of heavy metal pollution arround the artisanal gold mining area in East Tulabolo, East Suwawa District, Bone Bolango Regency, to understand its impact on the environment. This study includes geomorphological, stratighraphic, and geological structural analyses as well as measurements of heavy metal content such as arsenic (As), mercury (Hg), and lead (Pb) in river sediments. The metods used include field surveys, sampling, and laboratory analysis with ICP-MS. While pollution levels were analyzed using the Geoaccumulation Index (Igeo). The result showed that heavy metal concentrations exceeded safe limits, with the highest accumulation found in tailling sediments.. The Igeo analysis indicated a mild level of pollution due to the high concentration levels in the control area. This study emphasizes the need for sustainable waste management and ongoing contamination monitoring, including biota and groundwater sampling, to indetify risks of bioaccumulation and movement of contaminants into the wider eccosystem.
Analisis Kerawanan Longsor Berdasarkan Parameter Geologi dan Geospasial di Biluhu Timur, Kecamatan Batudaa Pantai, Gorontalo Najib Modeong; Muh Kasim; Ronal Hutagalung
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Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jrpi.v3i4.41814

Abstract

Biluhu Timur Village and its surroundings, located in Batudaa Pantai District, Gorontalo Regency, have a topography ranging from hills to coastal plains and relatively high rainfall, which makes them prone to landslides. This study aims to analyze the geological and geomorphological conditions and to map landslide susceptibility zones in Biluhu Timur Village and its surroundings at a scale of 1:25,000. The method used is Multi Criteria Evaluation based on a Geographic Information System (GIS), applying scoring, weighting, and overlay of six parameters: slope, rainfall, lithology, land use, soil type, and lineament density. The study area consists of four geomorphological units and four rock units, namely basalt, diorite, reef limestone, and coastal deposits, with joints as the secondary structure. The analysis of an area of 2,899.48 ha shows that high susceptibility covers 1,455.51 ha (49.16%), moderate susceptibility 1,351.29 ha (47.64%), and low susceptibility 92.68 ha (3.20%). Biluhu Timur Village falls within the high susceptibility class.
Co-Authors Agustaman, Rukmini Agustinus Sosang Ahmad Zainuri Ahmad Zainuri Ahmad Zainuri Ahmad, Artina Ahmad, Fadhil Abdillah Aisyah Alya H Panai Alfi Ilda Sasmida Alifia Widya Warapsari Badaru Alifia Widya Warapsari Badaru Alya Rahmawati Panai Amalia Putri Paputungan Anastasya Putri Bengga Andianto Pintoro Anggun Farwati M Abdullah Anisa Sawitri B. Bania Aprilia Mohune Aris, Ayub Pratama Atima, Karina Febriani K. Candrawati Pulogu chisilia maloho Cinta Mutia Panto Dachi, Mirdayanti Damogalad, Yustina Deden, Mokoagow Deden Dewi Rahmawaty Isa Dian M. Nasution Dicky Rahmansyah S. Tone Diwa Ahmad Luly Djamal Adi Nugroho Uno Ente, Amargio Saputro Farel H. Napitupulu Ghaneswara, Oka Arin Hemeto, Fasya Ramadhan Himsar Ambarita Hisyam, Febrina I Gede Sindu Pratama Indriani Indriani Intan Noviantari Manyoe Ivan Taslim Jingga Hamdata Kasim, Muhammad Kodung, Mohamad Ashar M. Iqbal Liayong Pratama maloho, chisilia Mane, Moh Sajandri Maryati, Sri Moh Al-Fayedh Moh Rifay Ahmad Mohamad Dio Pangulu Mohamad Ilham D. Djou Mohamad Saputra Hamzah Mokodompit, I Gede Wahyu Mooduto, Tirsya Aygina Jaenet Muarif, Fahmy Idris Muh Kasim Muh Nasrullah Al Fauzan Muh. Kasim Muhammad Kasim Muhammad Kasim Najib Modeong Nana Juhriana Yusuf Nani Mardiani Novariani Payuyu Noviar Akase Nurahman, Ikwan Nurmasita Dewi Sahido Pade, Dwi Ziana Jamila Permana, Aang Panji Ponto, Nadia Fransisca Puhi, Rian Putra, Moh. Bahrul Zaman Momidu Rahman, Adisty S. Reskiyanto Fauzi Duwingik Rikarni Taruk Tiku Rini Rahmatia S Safari, Indriani Siti Qamariyah Bunga Sri Maryati Suaib, Angki Suci Rahmawati Mustapa Sugianti, Komang Sultan Ali A.S.H Hutuba Sumarjis, Suly Ayu Sunarty Suly Eraku Sutarto, Tiara Anggraeni Puspaningrum Suwandi, Joga Bagaswicaksono Tangkudung, Latifa Tanzilal Pena Taufiq B. N Terang U.H.S.G Manik Tulus B. Sitorus Tya Ivanka Hiola umar, Risky Usman, Fatma T. Wahyulin Ws. Harunja Yani, Lisra Yayu Indriati Arifin Yenayo, Hafipa Yuriadi, Bilal Aditya