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All Journal Jurnal Geocelebes Journal of Geoscience, Engineering, Environment, and Technology Indonesian Physical Review Geosains Kutai Basin
Lepong, Piter
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Earth & Planetary Sciences Education Engineering Environmental Science Physics

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Subsurface Characterization using Electrical Resistivity Tomography (ERT) for Sponge City Planning in Nusantara Capital City (IKN), Indonesia: Karakterisasi Bawah Permukaan Menggunakan Geolistrik Resistivitas (ERT) untuk Perencanaan Kota Spons di Ibu Kota Nusantara (IKN), Indonesi Wahidah, Wahidah; Lepong, Piter; Supriyanto, Supriyanto; Djayus, Djayus; Firdaus, Muhamad Akmal; Azisyarlina, Dwi
JURNAL GEOCELEBES Vol. 9 No. 2: October 2025
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/geocelebes.v9i2.47083

Abstract

Clay shale dominates the lithology along access roads in the IKN development area. Its impermeable nature poses challenges to implementing the Sponge City concept, which relies on enhanced rainwater absorption to reduce surface runoff. This study aims to map the spatial distribution of clay shale and assess its implications for Sponge City planning. The geoelectrical resistivity method was applied at three sites, each consisting of one long section and three cross sections. Resistivity contrasts were used to delineate subsurface lithology, producing two- and three-dimensional models. The results reveal three main lithological units: topsoil, clay shale, and sandy clay. Topsoil shows heterogeneous resistivity values with thicknesses ranging from <1 m to 5 m. Clay shale exhibits resistivity values below 50 Ωm and thicknesses of <5–30 m, while sandy clay exceeds 50 Ωm with variable thicknesses up to 30 m. The thick, low-resistivity clay shale indicates poor permeability, which limits infiltration and groundwater storage. These findings suggest that the IKN area is less suitable for a natural sponge system. Therefore, stormwater management should prioritize engineered solutions such as green roofs, retention ponds, and bioretention facilities to control runoff and support sustainable urban development.
STUDY OF SOIL STRATIFICATION IN LANDSLIDE AREAS ON BANTUAS ROAD USING THE RESISTIVITY GEOELECTRIC METHOD Haryono, Arif; Supriyanto, Supriyanto; Djayus, Djayus; Mislan, Mislan; Lepong, Piter; Abbas, Asri Yana Pratama
Indonesian Physical Review Vol. 7 No. 1 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i1.297

Abstract

A landslide is a natural disaster that often occurs in the Palaran sub-district, Samarinda, East Kalimantan. This sub-district with an area of ​​221.29 km2 is considered strategic as a buffer area for the National Capital City (IKN). Construction of toll roads, ports, factories, and housing has begun to be carried out here. However, in Palaran there are still many roads damaged due to landslides, one of which is Bantuas Road. To study soil stratification on the Bantuas Road section, research has been carried out using the dipole-dipole configuration of the resistivity geoelectric method. The data acquisition process was carried out at two locations, namely at the first landslide (STA 7+150) and the second landslide (STA 9+450), with each location consisting of three lines. The data processing uses Res2Dinv software to produce a two-dimensional model. Based on the resulting model, it is known that the landslide area at STA 7+150 is at a distance of 48 to 96 meters with the slip area at a depth of around 11 to 12 meters. Meanwhile, at STA 9+450, the landslide area occurred at a distance of 48 to 80 meters with the slip area at a depth of 8 to 10 meters. The slip area in the first landslide is interpreted to have occurred at the contact area between unconsolidated material and dense sand, while in the second landslide, it occurred at the contact area between weak silty sand and dense sandy clay.
Application of Seismic Refraction Tomography in Determining the Soil Hardness Level in IKN Nusantara Area Alamsyah, Andi; Lepong, Piter; Wahidah, Wahidah; Rahmiati, Rahmiati
JURNAL GEOCELEBES Vol. 8 No. 1: April 2024
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/geocelebes.v8i1.32159

Abstract

Numerous studies supporting infrastructure construction are currently underway in the New Capital Territory of Nusantara (IKN Nusantara). A geophysical method known as Seismic Refraction Tomography (SRT) has been employed within the IKN Nusantara to identify hard and soft layers based on the P-wave velocity (Vp). The data acquisition involved 24 channels of geophone spaced at intervals 3 and 4 meters. Measurements were conducted alongfour trajectories of 69 and 92 meters, reaching penetration depths of 12 – 20 meters. P-wave velocity values ranging between 200 – 3500 m/s were recorded. Additionally, the Unconfined Compressive Strength (UCS) value was determined using an empirical equation tailored for mudrock-shale lithology, establishing the correlation between Vp and UCS. In the shallow depths of 0 – 3 meters, UCS values indicated levels below 20 MPa, classifying the materials as having  low to medium hardness. However, at depths greater than 3 meters, this layer transitioned to material with high hardness levels, as evidenced by UCS rate exceeding 20 MPa across all trajectories. This suggest that the IKN Nusantara is conducive to infrastructure development.
Co-Authors Abbas, Asri Yana Pratama Aditya Rinaldi Adrianus Inu Natalisanto Alamsyah, Andi Amalia, Ani Andini, Dela Antony, Nurvani Arifullah, Ery Asmaidi Asmaidi azisyarlina, Dwi Daud, Anye Gidalti Dayattullah, Muhammad Djayus Djayus, Djayus Fajarwati, Delia Aurora Firdaus, Muhamad Akmal Hadi Kusuma, Mohammad Felik Haryono, Arif Hasani, Ruslan Hendarwati, Emy Khairil Himawan Sadewo, Hengky Julianti, Sri Rezeki Laila, Nor Linda, Fitria Nova Maulana, Ansar Maulana, Risky Maulidsandy, Penta Adenata Mawadah, Anis Mislan Munir, Rahmiati Perkasa Putra Suhartono, Yaumil Ramadiandri Prasetyo, Gaguk Lulus Puspita Sari, Claudia Dewi Rahmiati Rahmiati Ramadana, Muhammad Ramadhan, Adi Buchori Rusmilawati, Depi Sarita, Rahma Sihombing, Jesika Sitorus, Merryana Desidoria Situmeang, Edberg Supriyanto Supriyanto Sutaji Putri, Devina Rayzy Perwitasari Suyitno Suyitno Syam, Ardian Tamarindi Rachman Putr, Galih Adenanthera Wahidah Wahidah