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All Journal REKAYASA Jurnal Rekayasa Geofisika Indonesia
Syarifatul Ulfah
Universitas Qamarul Huda Badaruddin
Agriculture, Biological Sciences & Forestry Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Physics

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Analisis Potensi Penurunan Muka Tanah Daerah Wisata Alam Aik Bukaq Syarifatul Ulfah; Adi Susilo
Jurnal Rekayasa Geofisika Indonesia Vol. 6 No. 02 (2024): Edisi Agustus JRGI (Jurnal Rekayasa Geofisika Indonesia)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v6i02.78

Abstract

Land movement is one of natural disaster that occurs unexpectedly. So, the mitigation needs to be provided as early as possible to avoid the impact of the disaster. One of the land movements that often occurs is land subsidence. Within this paper aims to analyze the value of land subsidence in the Nature Tourism area of Aik Bukaq. The land movement was estimated from Sentinel 1A image data with starting from the data range for April 2022 – 2024 and processed using the DInSAR (Differential Interferometry Synthetic Aperture Radar) method in SNAP software. The DinSAR method is one of method that often used to analyze the value of land subsidence. ​Because it’s able to record data in any condition. After processing data in SNAP software, land subsidence values ​​were read and mapped at the coordinate points of research area using Google Earth Pro software. Therefor results obtained the average value of land subsidence in last of 2 years (2022 – 2024), from -0,18 cm/year and -0,21 cm/year respectively. With an average of -0,114 cm/year which is included in the very low land subsidence category. However, there is a significant increase of value in the last 2 years, which really needs to be beware as an initial step to mitigate the impacts of land movement disasters. Because at any time it can happen in the Nature Tourism area of Aik Bukaq
Identification of Groundwater Aquifer Layers in Sajang Using Vertical Electrical Sounding Syarifatul Ulfah; Arif Wijaya
Rekayasa Vol 19, No 1: January - April 2026
Publisher : Universitas Trunodjoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v19i1.32011

Abstract

Groundwater availability is an essential factor in supporting domestic activities, agriculture, and tourism development in Sajang Village, East Lombok, Indonesia. Nevertheless, scientific information regarding subsurface groundwater potential in this volcanic region remains limited. The research contribution is the evaluation of subsurface lithology and groundwater aquifer potential in Sajang using the Vertical Electrical Sounding method to support groundwater exploration planning. This research applied the Vertical Electrical Sounding (VES) technique with the Schlumberger electrode configuration at two observation points. Field measurements were processed through inversion analysis using IP2WIN software to obtain true resistivity values and interpret lithological characteristics beneath the surface. The interpretation results reveal that the subsurface structure is dominated by volcanic rocks consisting of overburden, andesite lava, and andesite breccia with generally high resistivity values. At the first sounding point, resistivity values range from 77.8 Ωm to 11 × 107 Ωm at depths reaching 150 m. Meanwhile, the second sounding point shows resistivity values between 17.2 Ωm and 44 × 105 Ωm at depths of up to 153 m. The absence of low-resistivity zones indicates that productive aquifer layers are not present within the investigated area. Consequently, groundwater drilling activities are not recommended at the measurement locations. This study provides updated hydrogeophysical information for groundwater assessment in volcanic terrains of East Lombok.
Co-Authors Adi Susilo Arif Wijaya