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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

JURNAL GEOCELEBES · Vol. 9 No. 2 (2025) · pp. 226–236

DOI
10.70561/geocelebes.v9i2.47083
ISSN
2579-5546, 2579-5821
Published
2025-10-30
Publisher
Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar
Language
en
License
creativecommons.org/licenses/by-nc-sa/4.0

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.

Keywords

Collaboration network of the authors

11 authors · 29 co-authorship links

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  • Mulawarman University
  • Affiliation unknown
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Co-authorOrganisationJoint articles
Andi AlamsyahMulawarman University3
Rahmiati RahmiatiMulawarman University2
Ricky RahmawatiMulawarman University1
M Noor AlamsyahAffiliation unknown1
Dadan HamdaniMulawarman University1

Affiliations come from OpenAlex; journal OAI-PMH metadata carries none. Authors without an OpenAlex ID are matched by name, which can merge or split people.

Metadata source: OAI-PMH (metadata jurnal) https://journal.unhas.ac.id/index.php/geocelebes/oai, first harvested 3 Nov 2026, last seen 3 Nov 2026.
Original metadata (oai_dc) 
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	<dc:title xml:lang="en">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</dc:title>
	<dc:creator xml:lang="en">Wahidah, Wahidah</dc:creator>
	<dc:creator xml:lang="en">Lepong, Piter</dc:creator>
	<dc:creator xml:lang="en">Supriyanto, Supriyanto</dc:creator>
	<dc:creator xml:lang="en">Djayus, Djayus</dc:creator>
	<dc:creator xml:lang="en">Firdaus, Muhamad Akmal</dc:creator>
	<dc:creator xml:lang="en">Azisyarlina, Dwi</dc:creator>
	<dc:subject xml:lang="en">clay shale</dc:subject>
	<dc:subject xml:lang="en">Nusantara Capital City</dc:subject>
	<dc:subject xml:lang="en">resistivity</dc:subject>
	<dc:subject xml:lang="en">sponge city</dc:subject>
	<dc:description xml:lang="en">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 &amp;lt;1 m to 5 m. Clay shale exhibits resistivity values below 50 Ωm and thicknesses of &amp;lt;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.</dc:description>
	<dc:publisher xml:lang="en">Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar</dc:publisher>
	<dc:date>2025-10-30</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:type xml:lang="en">Peer-reviewed Article</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://journal.unhas.ac.id/index.php/geocelebes/article/view/47083</dc:identifier>
	<dc:identifier>10.70561/geocelebes.v9i2.47083</dc:identifier>
	<dc:source xml:lang="en">JURNAL GEOCELEBES; Vol. 9 No. 2: October 2025; 226–236</dc:source>
	<dc:source>2579-5546</dc:source>
	<dc:source>2579-5821</dc:source>
	<dc:language>en</dc:language>
	<dc:relation>https://journal.unhas.ac.id/index.php/geocelebes/article/view/47083/13618</dc:relation>
	<dc:rights xml:lang="en">Copyright (c) 2025 JURNAL GEOCELEBES</dc:rights>
	<dc:rights xml:lang="en">https://creativecommons.org/licenses/by-nc-sa/4.0</dc:rights>
</oai_dc:dc>