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All Journal Jurnal Geominerba
Hilman Suwargana
PPSDM Geominerba, KESDM
Earth & Planetary Sciences Education Engineering Other

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PEMETAAN KELURUSAN DAN APLIKASINYA UNTUK PENILAIAN BAHAYA GERAKAN TANAH: STUDI KASUS WILAYAH SUMEDANG Nendi Rohaendi; Hilman Suwargana
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 3 No 2 (2018): Jurnal Geominerba - 2018
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v3i2.90

Abstract

Sumedang has a high potential for landslide. The landslide can cause property damages and casualties. According to some researches, landslide is affected by many factors, such as geological structure. One of the methods to discover the geological structure is by conducting lineament mapping based on SRTM data (shuttle radar topography mission). After the lineament mapping is collected, the fault density analysis is conducted by using geography information system software. Then, the result of the analysis is analyzed using qualitative methods of drainage pattern analysis, lithology, and rose diagram analysis. The result of the field check shows that the area with a high fault density has a high potential of landslide. The result of this research can be useful as a preliminary data for the comprehensive landslide analysis in the research area.
APLIKASI METODE RESISTIVITAS DC UNTUK PENDUGAAN BIDANG LONGSOR DAN BIDANG GELINCIR DI JALAN KERETA API KM 107 (1/5), CIGANEA, PURWAKARTA, JAWA BARAT Hilman Suwargana
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 3 No 1 (2018): Jurnal Geominerba - 2018
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v3i1.95

Abstract

Landslide which occurred at the railroad km 107 (1/5) Ciganea, Purwakarta, West Java, is tirggered by rainwater seeping into the porous rock such as breccias, sandstones, and soil, so as increasing the weight of the rock/soil. When the water is up to the rock that is impermeable, then the water will be moving over the rock, so that the rock serves as a sliding plane. If there is a rock that is above the sliding plane, then the rock will move in the sliding plane. One of the geophysical methods that can detect areas of landslide and sliding plane is Resistivity method. Resistivity method can detect areas of landslide and sliding plane based on value of rock resistivity. Data acquisition using method of electrical resistivity tomography. Based on resistivity section of line 1 which has been correlated with the drill data of BM-05, obtained litology at sliding plane is sandy clay with resistivity values of: (3.37 - 5.12) Ohm.m and claystone with resistivity values of < 3,36Ohm.m, whereas litology of landslide plane is sandstone with resistivity of: (7.81 - 18.00) Ohm.m and breccias with resistivity >18.1 Ohm.m.
DAMPAK GEMPA BUMI DI SULAWESI BARAT DAN UPAYA MITIGASI Supartoyo; Hilman Suwargana; Arnan Karim
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 7 No 2 (2022): Jurnal Geominerba 2022
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v7i2.101

Abstract

On Friday of January 15, 2021 at 19:23 local time, the Mamuju area and its surroundings were hit by a destructive earthquake with a magnitude of 6.2 Mw (moment magnitude) which resulted disaster, which are : 105 people died (95 people in Mamuju Regency and 10 people in Majene Regency), 3,369 people were injured, about 3,750 buildings were damaged in Mamuju Regency and 4,172 buildings were damaged in Majene Regency. In addition, there are present of collateral hazard include ground crack, liquefaction and landslide. The maximum of earthquake intensity scale occurred in the Mamuju area of VII MMI (Modified Mercally Intensity). Seventeen months later, on Wednesday, June 8, 2022, at 12:32:36 local time, the Mamuju area and its surroundings were again hit by a destructive earthquake with a magnitude of 5.8 Mw. This earthquake also resulted disaster, which are : 17 people were injured, many buildings and 70 houses were damaged in Mamuju Regency. The earthquake intensity scale of V MMI. The two destructive earthquakes event give lessons learn of the importance for earthquake mitigation efforts. The results of field observations show that earthquake mitigation efforts have not been optimal in the West Sulawesi area. The fact that people still panicked during the earthquake and the amount of damage to buildings. Earthquake mitigation efforts through structural and non-structural mitigation must be increased in the West Sulawesi area to reduce the risk if an earthquake repeat in the future.
Co-Authors Arnan Karim Nendi rohaendi Supartoyo