Journal of Degraded and Mining Lands Management
Vol 9, No 2 (2022)

Identification of subsidence hazard zone by integrating engineering geological mapping and electrical resistivity tomography in Gunung Kidul karst area, Indonesia

Wahyu Wilopo (Department of Geological Engineering, Universitas Gadjah Mada, Indonesia)
Doni Prakasa Eka Putra (Department of Geological Engineering, Universitas Gadjah Mada, Indonesia)
Teuku Faisal Fathani (Department of Civil and Environmental Engineering, Univsersitas Gadjah Mada, Indonesia)
Slamet Widodo (Department of Civil Engineering, Universitas Negeri Yogyakarta, Indonesia)
Galeh Nur Indriatno Putra Pratama (Department of Civil Engineering, Universitas Negeri Yogyakarta, Indonesia)
Maris Setyo Nugroho (Department of Civil Engineering, Universitas Negeri Yogyakarta, Indonesia)
Wisnu Rachmad Prihadi (Department of Civil Engineering, Universitas Negeri Yogyakarta, Indonesia)



Article Info

Publish Date
01 Jan 2022

Abstract

The presence of natural cavities in karst morphology may cause severe civil engineering and environmental management problems. Karst formations will limit the expansion of urbanization, especially infrastructure development in limestone areas. Geophysical methods, especially electrical resistivity tomography (ERT) techniques, are effective and efficient solutions to detect voids below the surface. This study aimed to develop a subsidence hazard map as basic information for infrastructure development. The identification was made by measuring electrical resistivity tomography on eight profiles in the infrastructure development plan. In addition, it was also supported by geological mapping, particularly the structural geology and types of rocks around the site. The research area consists of massive limestone, bedded limestone, and cavity limestone with generally north-south joints. The analysis of geological mapping data and electrical resistivity tomography measurements showed that the cavity limestone was identified with a north-south elongated pattern in line with the fracture pattern found on the surface at the research area. The surface lithology type, the geological structures density, and the subsurface lithology were used to develop a subsidence hazard map. This information is beneficial in determining the safe location of infrastructure development based on disaster risk mitigation.

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Journal Info

Abbrev

jdmlm

Publisher

Subject

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

Description

Journal of Degraded and Mining Lands Management is managed by the International Research Centre for the Management of Degraded and Mining Lands (IRC-MEDMIND), research collaboration between Brawijaya University, Mataram University, Massey University, and Institute of Geochemistry, Chinese Academy of ...