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All Journal Journal of Degraded and Mining Lands Management Jurnal Pengabdian Masyarakat Bhinneka
Busthan, Busthan
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Economics, Econometrics & Finance Education Public Health

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A new approach to determining the slip surface in tuff to determine the volume of landslide material: A case study on the West Sinjai road section, Sinjai Regency, South Sulawesi, Indonesia Busthan, Busthan; Pachri, Hendra; Alimuddin, Ilham; Bahri, Syamsul; Bundang, Syarifullah
Journal of Degraded and Mining Lands Management Vol. 11 No. 2 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.112.5533

Abstract

Analysis of landslide slip surface based on the engineering properties of tuff rocks, including shear strength, water content, and infiltration rate on the West Sinjai road section, South Sulawesi, Indonesia. This study aimed to analyze the effect of shear strength, water content infiltration rate, and weathering grade of tufa rocks in the study area. The methods used in this study area included a study of weathered tuff profile characteristics, weathered tuff infiltration testing and residual soil (RS) determination of weathered tuff water content and residual soil, and testing of shear strength of weathered tuff and residual soil. This research used aspects of engineering geology, including shear strength, water content, and infiltration rate, as well as rock weathering grade to determine the slip surface in tuff to determine the volume of landslide material. The results showed that the tuff profile consisted of four grades, namely moderately weathered tuff (MW), highly weathered tuff (HW), completely weathered tuff (CW), and soil residual (RS). The rate of tuff infiltration increases with increasing weathering grade. The water content is more significant with the high degree of weathering of tuff. At the same time, the shear strength decreases with high weathering. Therefore, the research area is prone to landslide events. The slip surface is in a layer of moderately weathered tuff rock (MW), and those that experience landslides are highly weathered tuff rock (HW), completely weathered (CW), and residual soil (RS).
Penguatan Kapasitas Masyarakat dan Pelaku Usaha Tambang dalam upaya Pertambangan Berkelanjutan di Sungai Barugaya, Kecamatan Polongbangkeng Timur Kabupaten Takalar Imran, A M; Safruddim, Safruddim; Irvan, Ulva Ria; Farida, Meutia; Busthan, Busthan; Sultan, Sultan; Burhanuddin, Muh Sulhuzair; Hidayah, Bahrul; Masse, Asti Gindasari; Jamil, Arifuddin
Jurnal Pengabdian Masyarakat Bhinneka Vol. 4 No. 2 (2025): Bulan November
Publisher : Bhinneka Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58266/jpmb.v4i2.817

Abstract

Pemanfaatan lahan Sungai Barugaya untuk kegiatan pertambangan aluvial di Desa Barugaya, Kecamatan Polongbangkeng, Kabupaten Takalar, Sulawesi Selatan, dilakukan secara intensif guna memenuhi kebutuhan material masyarakat, pemerintah, dan sektor swasta. Aktivitas ini berpotensi menimbulkan dampak lingkungan apabila tidak dikelola secara berkelanjutan. Oleh karena itu, kegiatan pengabdian kepada masyarakat ini dilaksanakan dengan pendekatan partisipatif dan kolaboratif, melibatkan masyarakat serta pelaku usaha tambang dalam setiap tahapan kegiatan. Program difokuskan pada penguatan kapasitas melalui pelatihan teknis tentang praktik pertambangan ramah lingkungan, reklamasi dan rehabilitasi lahan pascatambang, serta pengelolaan limbah tambang. Selain pelatihan, dilakukan observasi langsung di lokasi tambang dan wawancara mendalam (in-depth interview) untuk mengidentifikasi praktik, tantangan, dan kebutuhan masyarakat setempat. Hasil kegiatan menunjukkan peningkatan pemahaman, kesadaran, dan keterampilan masyarakat dalam menerapkan prinsip pertambangan berwawasan lingkungan. Program ini efektif dalam mendorong pengelolaan sumber daya alam yang lebih bertanggung jawab, mandiri, dan berkelanjutan, serta berkontribusi pada upaya perlindungan ekosistem Sungai Barugaya. 
Slip surface identification using electrical resistivity tomography for landslide hazard management in degraded land: A case study from Tabbinjai, South Sulawesi Mallarangeng, Nurjinaan Fakri A.; Busthan, Busthan; Sultan, Sultan
Journal of Degraded and Mining Lands Management Vol. 13 No. 3 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.133.10657

Abstract

Gowa Regency, South Sulawesi Province, has long been subject to recurrent shallow landslides, degrading its hillslopes by removing productive topsoil, disrupting drainage systems, and threatening the livelihoods of local communities. But no meaningful land rehabilitation effort can be carried out unless what is underneath these unstable slopes is known. This was the first subsurface investigation in this region. This study fills the gap by applying two-dimensional Electrical Resistivity Tomography (ERT) with the Wenner-Schlumberger array configuration in three survey profiles to identify and map the slip surfaces controlling the slope failure. The data were inverted using RES2DINV software to obtain 2D models of the subsurface resistivity. All profiles show a similar three-layered subsoil structure: a shallow clay-rich layer (1-15 ?m), a weathered tuff layer (30-50 ?m) at a depth of 5-7 m, which is the main slip surface, and competent volcanic bedrock of breccia and basalt (100-250 ?m) at the surface. When saturated, the weathered tuff loses shear strength dramatically, driving translational landslides that have repeatedly degraded this landscape. The robustness of these results is supported by subsequent landslip events at the investigated sites, with failure behavior consistent with the subsurface model derived from the ERT. The results provide a concrete spatial foundation for prioritizing subsurface drainage, slope revegetation, and land-use zoning as integrated strategies for the rehabilitation of landslide-degraded land in Tabbinjai.
Co-Authors Burhanuddin, Muh Sulhuzair Hidayah, Bahrul Ilham Alimuddin, Ilham Imran, A M Jamil, Arifuddin Mallarangeng, Nurjinaan Fakri A. Masse, Asti Gindasari Meutia Farida Pachri, Hendra Safruddim, Safruddim Sultan Sultan Syamsul Bahri Syarifullah Bundang Ulva Ria Irvan