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All Journal Civil Engineering Journal Jurnal Abdi Masyarakat Indonesia Indonesian Geotechnical Journal International Journal of Disaster Management
Faridha Aprilia
Program Studi Teknik Geofisika, Fakultas MIPA, Universitas Brawijaya, Indonesia
Humanities Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Public Health Social Sciences

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Sosialisasi Potensi Air Bawah Tanah (ABT) sebagai Upaya Pencegahan Kekeringan di Desa Jabung, Kabupaten Malang Mayang Bunga Puspita; Faridha Aprilia; Sunaryo Sunaryo; Triswantoro Putro; Dewi Anggraeni; Risalatul Latifa
Jurnal Abdi Masyarakat Indonesia Vol 2 No 5 (2022): JAMSI - September 2022
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.440

Abstract

Desa Jabung merupakan suatu desa yang berada di Kecamatan Jabung, Kabupaten Malang. Kondisi air tanah di desa ini beragam, ada wilayah dengan potensi air tanah yang bagus seperti Dusun Krajan, namun beberapa dusun lain seperti Umpak, Boro Jabung, Mindi, dan Gunungjati mempunyai potensi air tanah yang kurang baik dan tergolong daerah yang mengalami kekeringan. Kegiatan pengabdian kepada masyarakat dari dosen Departemen Fisika Universitas Brawijaya dilakukan di Desa Jabung pada tanggal 11 September 2020 kepada perangkat desa Jabung. Sosialisasi dilakukan secara semi-daring (hybrid) dengan perangkat desa Jabung dan satu orang dosen pelaksana berada di Kantor Desa Jabung, serta dosen pelaksana yang lain mengikuti sosialisasi ini lewat zoom. Materi sosialisasi yang diberikan berupa pengetahuan mengenai Air Bawah Tanah (ABT) dan hasil pemetaan potensi ABT di Desa Jabung. Dari hasil evaluasi kegiatan sosialisasi ini, diketahui bahwa materi sosialisasi sangat diperlukan oleh perangkat Desa Jabung untuk mengatasi kekeringan di Desa Jabung, serta harapan untuk melakukan kegiatan yang serupa di masa yang akan datang.
Hazards Mitigation of Lahar Flows on Semeru Volcano after the 4 December 2021 Eruption Based on PS-InSAR Cholisina Anik Perwita; Faridha Aprilia; Sukir Maryanto; Harun Arrasyid; Aqyla Farah Tsabitah
International Journal of Disaster Management Vol 5, No 3 (2022): December
Publisher : TDMRC, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/ijdm.v5i3.29098

Abstract

Volcanic eruption is one of the phenomena that can change the volcanic landscape drastically. Monitoring of volcanic edifices after eruptions should be considered to further understand the potential hazards in the future. Satellite monitoring is a reliable technique for assessing deformation in a volcano. InSAR was applied to detect material build-up after the eruption phase of Semeru Volcano in December 2022. As a consequence of the opening crater along with the InSAR result, a lahar product after the eruption was deposited in the southwest direction. Significant deformations were indicated by PS-InSAR near the crater, which was characterized by a LOS displacement of -10 to -40 mm/year, indicating scouring of the pyroclastic material moving down the slope.  The accumulation of pyroclastic flows from the abrading process below was detected in the proximal zone of Semeru, as shown by the positive LOS displacement ranging from 10 to 40 mm/year. The field survey conforms to the PS InSAR results, where unconsolidated material, ranging in size from gravel to boulders, piles up approximately 4-5 m in Curah Kobokan.  Highly unconsolidated material tends to move easily by water and threaten the surrounding settlements. Overlying PS InSAR and drainage pattern in the flank of Semeru, concluding several locations that have a high-risk potential of being affected by lahar flows are Curah Kobokan, Supiturang Village, Pronojiwo District, then Tulungrejo, Pasropan Village, Pasrujambe District, Lumajang Regency.
Subsurface Analysis Using Microtremor and Resistivity to Determine Soil Vulnerability and Discovery of New Local Fault Adi Susilo; Alamsyah M. Juwono; Faridha Aprilia; Farizky Hisyam; Siti Rohmah; Muhammad Fathur Rouf Hasan
Civil Engineering Journal Vol 9, No 9 (2023): September
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2023-09-09-014

Abstract

Microtremor and geoelectrical resistivity surveys have been conducted in areas where the April 10, 2021, earthquake of 6.1 Mw caused the most damage. Wirotaman Village, Malang Regency, was one of the regions with the most extensive damage. This study aims to investigate the seismic vulnerability and subsurface conditions that result in severe damage at the research location. This study's Horizontal to Vertical Spectral Ratio Analysis (HVSR) curve was derived from the recorded microtremor signal in the frequency domain. The frequency parameter and amplification factor obtained from the curve are used to determine the seismic vulnerability index. In addition, a geoelectrical resistivity study with a dipole-dipole configuration was conducted at the site with the most extensive damage. The results of this study show the correlation between the results of the HVSR curve analysis and geoelectrical resistivity in determining the seismic vulnerability of an area. The results indicated that the high seismic vulnerability index value ranged from Kg= 12.0 to 18.0, with the most severe damage concentrated in the Southwest at SA 05 and SA 06. Based on the results of the geoelectrical survey, information was obtained that several points of damage to buildings at SA 05 (red circle) were on the same line, where this condition was associated with the possibility of new faults at that location. This microtremor and geoelectric resistivity investigation reveals thick sedimentary deposits with a high seismic vulnerability index and low resistivity. This study's findings can be utilized as a guide for micro zonation studies in research areas. This research contributes to the surrounding community in the form of disaster mitigation, where construction must avoid local fault positions that have been found to reduce the level of damage when natural geological disasters occur. Doi: 10.28991/CEJ-2023-09-09-014 Full Text: PDF
Hazards Mitigation of Lahar Flows on Semeru Volcano after the 4 December 2021 Eruption Based on PS-InSAR Cholisina Anik Perwita; Faridha Aprilia; Sukir Maryanto; Harun Arrasyid; Aqyla Farah Tsabitah
International Journal of Disaster Management Vol 5, No 3 (2022): December
Publisher : TDMRC, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/ijdm.v5i3.29098

Abstract

Volcanic eruption is one of the phenomena that can change the volcanic landscape drastically. Monitoring of volcanic edifices after eruptions should be considered to further understand the potential hazards in the future. Satellite monitoring is a reliable technique for assessing deformation in a volcano. InSAR was applied to detect material build-up after the eruption phase of Semeru Volcano in December 2022. As a consequence of the opening crater along with the InSAR result, a lahar product after the eruption was deposited in the southwest direction. Significant deformations were indicated by PS-InSAR near the crater, which was characterized by a LOS displacement of -10 to -40 mm/year, indicating scouring of the pyroclastic material moving down the slope.  The accumulation of pyroclastic flows from the abrading process below was detected in the proximal zone of Semeru, as shown by the positive LOS displacement ranging from 10 to 40 mm/year. The field survey conforms to the PS InSAR results, where unconsolidated material, ranging in size from gravel to boulders, piles up approximately 4-5 m in Curah Kobokan.  Highly unconsolidated material tends to move easily by water and threaten the surrounding settlements. Overlying PS InSAR and drainage pattern in the flank of Semeru, concluding several locations that have a high-risk potential of being affected by lahar flows are Curah Kobokan, Supiturang Village, Pronojiwo District, then Tulungrejo, Pasropan Village, Pasrujambe District, Lumajang Regency.
Type of Rockslide along the Ponorogo – Pacitan Roads, East Java, Indonesia Arief Rachmansyah; Faridha Aprilia
Indonesian Geotechnical Journal Vol. 2 No. 3 (2023): Vol. 2, No. 3, December 2023
Publisher : Himpunan Ahli Teknik Tanah Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56144/igj.v2i3.47

Abstract

The Pacitan Regency, located in the southwestern part of East Java Province, is one of the areas with low economic growth. Difficult accessibility is one of the reasons for the slow development of this region. To reaching the Pacitan Regency it can take through the Ponorogo – Slahung – Arjosari - Pacitan roads. Based on the geological condition most of roads are built on geologic formations composed of Oligocene - Miocene volcanic and intrusive rocks. Mass movement often occurs along roads and disturbs the transportation of goods and people. This paper discusses the types and mechanisms of slope failure along roads. Recognizing these two aspects of slope failure plays important role to treat them. The field survey identified 13 landslide zones with a 50–200 m bright. Based on rock type, weathering and alteration levels, and geological structure, slope failure can be classified into three types. First, the wedge rockslide  occurred on the low-altered dacitic lapilli tuff. The planar – toppling type of rockslide occurred in the residual soil of the andesitic basalt lava with columnar and sheeting joint. Third, complex circular debris slides occur in highly jointed and altered dacitic intrusive rocks, which contain a large amount of clayey material. The third slide type that occurred at km 226 requires further research with an interdisciplinary approach because of moving the 200-meter-long road mass.
Co-Authors Adi Susilo Alamsyah M. Juwono Aqyla Farah Tsabitah Arief Rachmansyah Cholisina Anik Perwita Farizky Hisyam Harun Arrasyid Mayang Bunga Puspita Muhammad Fathur Rouf Hasan Risalatul Latifa Siti Rohmah Sukir Maryanto Sunaryo Sunaryo Triswantoro Putro