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Khalik, Ikdham Nurul
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Humanities Earth & Planetary Sciences Education Social Sciences

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Sumber Daya Pasir Silika di Capkala Kabupaten Bengkayang Kalimantan Barat Khalik, Ikdham Nurul; Arum, Deno Ambar; Uno, Djamal Adi Nugroho
PESHUM : Jurnal Pendidikan, Sosial dan Humaniora Vol. 4 No. 3: April 2025
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/peshum.v4i3.9356

Abstract

Kajian ini menyajikan eksplorasi awal endapan pasir silika di Kecamatan Capkala dan Sungai Raya, Kabupaten Bengkayang, Kalimantan Barat. Meliputi area seluas sekitar 700 hektar, penyelidikan ini melibatkan survei lapangan, pengambilan sampel, dan pembuatan blok model dengan menggunakan aplikasi surpac untuk menentukan potensi sumber daya pasir silika. Temuan menunjukkan estimasi sumber daya tersirat sebesar 35,6 juta m³, dengan kualitas pasir yang bervariasi yang dipengaruhi oleh pengotor seperti oksida besi dan bahan organik. Kajian ini menyoroti perlunya eksplorasi lebih lanjut yang lebih rinci untuk mendukung pemanfaatan sumber daya secara efisien.
Identification of Landslide-Prone Areas and Slip Zones Along the National Road in Bunut, Kapuas District, Sanggau Regency Khalik, Ikdham Nurul; Nusantara, Rossie W.; Nurhayati, Nurhayati
Jambura Geoscience Review Vol 8, No 1 (2026): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v8i1.35609

Abstract

Landslides repeatedly disrupt the national road corridor in Bunut Sub-District, Kapuas District, Sanggau Regency (West Kalimantan), indicating that slope failure is strongly controlled by subsurface conditions that cannot be reliably inferred from surface observations alone. This study delineates landslide-prone segments and interprets the subsurface slip surface using 2D electrical resistivity imaging with the Wenner–Schlumberger array. Field measurements were conducted along three 120 m survey lines using 13 electrodes with 10 m spacing, and the data were inverted (Res2Dinv) to obtain true-resistivity sections for each line. Interpretation was guided by published resistivity classifications and the local geomorphological setting. The resistivity models reveal a clear stratification of near-surface materials, with low-resistivity zones (300 Ωm) interpreted as water-saturated, clay-rich layers and higher-resistivity zones representing comparatively drier and more permeable materials. The slip surface is consistently expressed as a sharp resistivity contrast and is interpreted at resistivity values of approximately 300–2400 Ωm at depths of about 6–18 m below ground level, suggesting a mechanically weak interface that is prone to shear under intense rainfall and pore-pressure increase. These results provide spatial constraints on slip-zone geometry that can be used to support hazard zoning and to prioritize mitigation along the road section, particularly through improved drainage, surface-water control, and slope management at locations where saturated low-resistivity materials underlie permeable surficial deposits. 
Co-Authors Arum, Deno Ambar Djamal Adi Nugroho Uno Nurhayati Nurhayati Nusantara, Rossie W.