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All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur Jurnal Ilmiah MTG
Erzagian, Egy
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Environmental Science

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The Mechanism of Rainfall-Induced Landslide Around Railway Tracks in Central Java Province, Indonesia Octaviarini, Ika Sakti; Fathani, Teuku Faisal; Hardiyatmo, Hary Christady; Amalina, Anisa Nur; Erzagian, Egy
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 19 No. 2 (2023): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v19i2.66835

Abstract

Landslide is one of the most disastrous natural hazards in Indonesia, causing significant fatalities and economic losses. Landslides can be triggered by several factors, such as rainfall, earthquakes, soil conditions, and others, where each landslide event has its own triggering and controlling factors. A progressive landslide occurred on the Central Java railway line which resulted in damage to the double-track railway as a transportation infrastructure. The objective of this paper is to understand the process and triggering factors of the landslide. Information was collected through field investigations and measurements based on drilling results at 3 points, geophysical surveys at 5 lines, and laboratory testing of several soil samples. Geological and geotechnical settings, topography, lithology, hydrogeology, and rainfall data of the area were analyzed. Aerial photographs and other remote sensing data were used to evaluate and discuss the information. Landslides in the study area occurred in stages, starting with the formation of a tension crack, followed by two landslides over five months. The results show that the clay material that dominates the study area is the dominant controlling factor of a landslide, triggered by long-duration, low-intensity rainfall. Rainwater entering through tension cracks increases moisture content, adding load to the slope and triggering landslides. Furthermore, the train's external load on the slope also contributes to the occurrence of landslides. The static and cyclic load of the train causes changes in the slope's pressure balance, generating a force that drives the downslope soil. Further analysis was performed using back analysis method with the limit equilibrium method to enhance understanding of slope stability parameters at the time of slope failure. The analysis was performed considering the rising groundwater level. A factor of safety (FS) value of 0.989 was obtained at the end of the simulation, indicating that the slope had failed.
Analisis Potensi Longsor Menggunakan Metode Analytical Hierarchy Process pada Kecamatan Panekan, Kabupaten Magetan Susatio, Raja; Arrisaldi, Thema; Erzagian, Egy; Hanifi Mada Mahendra, Fathan
Jurnal Ilmiah MTG Vol 15 No 1 (2025): Jurnal Ilmiah MTG Volume 15 No.1 Tahun 2025
Publisher : Jurusan Teknik Geologi Fakultas Teknologi Mineral UPN "Veteran" Yogyakarta

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Abstract

Panekan Sub-district, Magetan Regency, is located on landslide prone area. To address this issue, a landslide susceptibility map is needed. This study aims to develop landslide susceptibility map for Panekan Sub-district using Analytical Hierarchy Process (AHP). AHP method was used to determine the weights and relative influence of five parameters which is slope, lithology, distance from structures, distance from rivers, and land use. The weight scores for each parameter are as follows: slope gradient (0,403), lithology (0,318), distance from structures (0,139), distance from rivers (0,084), and land use (0,056). Each parameter was analyzed spatially using Geographic Information System (GIS). AHP analysis produced map with values ranging from 0,99 to 4,31. Zonation was classified using the index method based on Regulation of Head of BNPB No. 2 of 2012. AHP analysis found that most areas of Panekan Sub-district are within medium hazard zone. These findings are expected to serve as a basis for local governments and communities to strengthen disaster mitigation and preparedness efforts.
Co-Authors Amalina, Anisa Nur Arrisaldi, Thema Hanifi Mada Mahendra, Fathan Hary Christady Hardiyatmo, Hary Christady Octaviarini, Ika Sakti Susatio, Raja Teuku Faisal Fathani