Abstract
The Final Disposal Site (TPA) of Batulayang Pontianak, West Kalimantan, uses an open dumping system so that it produces waste water (leachate). Its area on peatlands creates problems, especially in the distribution of leachate. The purpose of this study was to create a 3D model of leachate distribution in the soil layer in the TPA area of Pontianak Batulayang, West Kalimantan, based on the distribution of resistivity values. This study using the geoelectric resistivity method by the Wenner-Schlumberger configuration. The tracks that have been used are six, having a length of 117 m each. The results showed that the soil layer contaminated by leachate spreads from a depth of 5 m to 23.6 m. This layer is interpreted as sandy clay and sand, having a resistivity value of 0.152 Ωm to 13 Ωm. The results also showed that leachate comes from the West, North, and South directions, which spread to all study areas.
Highlights
The Final Disposal Site (TPA) of Batulayang Pontianak, West Kalimantan, uses an open dumping system so that it produces waste water
The purpose of this study was to create a 3D model of leachate distribution in the soil layer in the TPA area of Pontianak Batulayang, West Kalimantan, based on the distribution of resistivity values
The results showed that the soil layer contaminated by leachate spreads from a depth of 5 m to 23.6 m
Summary
Volume 17, Nomor 2, Agustus 2020 ISSN : 1829-796X (print); 2514-1713(online) https://ppjp.ulm.ac.id/journal/index.php/f/. The purpose of this study was to create a 3D model of leachate distribution in the soil layer in the TPA area of Pontianak Batulayang, West Kalimantan, based on the distribution of resistivity values. Penelitian terkait sumber air baku di area TPA Batulayang Pontianak menunjukkan bahwa lindi menyebar hingga sejauh 600 m dan mencemari air sumur warga (Maryani, Marsudi, & Nashrullah, 2016). Lapisan tanah di sekitar TPA Batulayang Pontianak yang terkontaminasi lindi memiliki nilai resistivitas kurang dari 10 Ωm (Apriasti et al, 2016). Sebaran lindi di sekitar TPA Batulayang Pontianak telah diidentifikasi menggunakan metode elektromagnetik dengan nilai konduktivitas sebesar 41 mS/m hingga 47 mS/m (21,3 Ωm hingga 24,4 Ωm) (Aswan, Sampurno, & Putra, 2014). Namun penelitian yang pernah dilakukan belum memperlihatkan model 3D sebaran lindi pada lapisan tanah di sekitar area TPA Batulayang Pontianak. Model 3D dapat menggambarkan sebaran lindi dari berbagai arah, baik secara lateral maupun vertikal
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