Identifikasi Lapisan Lapuk Bawah Permukaan Menggunakan Seismik Refraksi di Desa Lengkeka Kecamatan Lore Barat Kabupaten Poso

Artono, Vicho Yugho; Efendi, Rustan; Sandra, Sandra

doi:10.22487/25411969.2017.v6.i3.9204

Cited by 4 publications

(6 citation statements)

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“…Penelitian terhadap ketebalan lapisan lapuk dinilai efektif jika dilakukan dengan survei geofisika, salah satunya menggunakan metode seismik refraksi [8], karena dapat mengetahui penampang struktur bawah permukaan yang relatif dangkal [9]. Metode ini dapat mengidentifikasi kecepatan gelombang seismik yang merambat di bawah permukaan pada setiap lapisan [10].…”

Section: Pendahuluanunclassified

Identifikasi Ketebalan Lapisan Lapuk pada Area Rawan Longsor Menggunakan Metode Seismik Refraksi (Studi Kasus: Desa Kalirejo Kabupaten Kulonprogo)

Muhardi

Perdhana

Utama³

et al. 2020

J. Teori Apl. Fis.

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Kalirejo Village, Pengasih District, Kulonprogo Regency, is an area that is prone to landslides. The purpose of this study is to identify the weathering layer thickness, which is one of the triggering factors for landslides. This study was conducted using the seismic refraction method by applying two lines. Line 1 uses 24 geophones, has a distance of 1 meter between geophones, while Line 2 uses 24 geophones, has a distance of 2 meters between geophones. The results showed that the velocity of seismic wave propagation in the weathering layer for Line 1 was 400 m/s, and in the slip surface was 2,300 m/s. The weathering layer thickness on Line 1 is 7.6 - 9.8 meters and the slope is steep so that this location is predicted to have a potential landslide. While the velocity of seismic wave propagation in the weathering layer for Line 2 was 300 m/s, and in the slip surface was 2,200 m/s. The weathering layer thickness on Line 2 is at less than 2 meters, so this location is predicted not to have a landslide potential even though the slope is steep

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Section: Pendahuluanunclassified

Identifikasi Ketebalan Lapisan Lapuk pada Area Rawan Longsor Menggunakan Metode Seismik Refraksi (Studi Kasus: Desa Kalirejo Kabupaten Kulonprogo)

Muhardi

Perdhana

Utama³

et al. 2020

J. Teori Apl. Fis.

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“…Potential damage to buildings due to deformation of the subsurface soil can be identified from the thickness of the weathered layer. (Artono, et al 2017;H Sulistiawan et al, 2016). In order to minimize the risk of construction damage during construction, a subsurface study to identify the thickness of the weathered layer needs to be carried out.…”

Section: Introductionmentioning

confidence: 99%

Geological Modelling of Lithosequent Based on Dem and Finite Element Method Inversion of Ves Data

et al. 2022

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The aims of this study are to develop interpretation of structural geology in lithosequent using DEM and finite elemen method based on VES data. This research was conducted on June 2021 untill January 2022 at Pasang District, North Toraja. Four main point location were selected and recorded in google earth. Those points were processed using software QGIS for developing 3D model, Saga-GIS for interpolated DEM and VES for generating 1D and 2D geoelectrical modelling. Data were interpolated using Universal Kriging method and analysed using IP2WIN software. The results of these research shows that Geostatistical Universal Kriging can be used for interpolating DEM in lithosequent Pasang Village, by using as the variogram equation and yield 95,12% determinations; VES method in geoelectrical resistivity can be configure into 2D and produce clearer modeling of pseudo-section; The synthetics data can be generated from field measurement data and interpretation of 2D VES; Result of synthetic block on geoelectrical data can be inverted using Finite Element Method and generated clearer data; By using these methods, the thickness of weathering layer in lithosequent Pasang Village can be estimated and modelling.

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“…Determination of the subsurface rock layer structure can be done using the seismic refraction method [4]. The seismic refraction method is used in shallow layers to determine the depth of bedrock IOP Publishing doi:10.1088/1755-1315/1228/1/012019 2 and does not require a prominent energy source or elaborate equipment [5]. The basic assumptions that must be met for shallow layering research are the earth medium is considered to be layered, and each layer propagates seismic waves at different speeds, the deeper the rock layers will be more compact, the seismic wavelength is smaller than the thickness of the earth's crust, seismic wave propagation can be viewed as light obeying the fundamental laws of light trajectory, at the boundary between layers, seismic waves propagate with velocity in the layer below, wave speed increases with increasing depth [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Identification of surface layer structure using seismic refraction for landslide mitigation in Tandikek region, West Sumatra Indonesia

Daraini,

Syafriani,

Akmam

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The landslide in West Tandikek Nagari, Padang Pariaman Regency, in 2009 was triggered by an earthquake that claimed hundreds of lives and buried several villages. Losses caused by landslides in West Tandikek Nagari should be minimized by studying the causes and symptoms of landslides. Disaster mitigation efforts must be carried out to anticipate and mitigate losses due to landslides so that the impacts can be overcome. These disaster mitigation actions can be carried out by identifying areas with the potential for landslides based on the subsurface structure in West Tandikek Nagari. This type of research was descriptive. Data collection is carried out directly using the Sysmatrack-MAE Seismograph, 12 geophones, GPS, gauges, trigger cables, geophone cables, and sources in the form of a seismic hammer and iron plate with the seismic refraction method. Data processing to obtain velocity and depth values for each track below the surface with the seismic refraction method and for interpretation used the Time-Term Inversion. The results obtained for the first layer are dominated by sand and soil materials. The second layer is dominated by alluvium gravel sand and clay. The relatively hard layer of clay and alluvium makes it difficult to store and pass water. This will cause water from the top layer to accumulate in the rock, which makes the rock slippery. This slippery clay layer will act as a subsurface for the weathering material above it to move out of the hillside

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Identifikasi Lapisan Lapuk Bawah Permukaan Menggunakan Seismik Refraksi di Desa Lengkeka Kecamatan Lore Barat Kabupaten Poso

Cited by 4 publications

References 0 publications

Identifikasi Ketebalan Lapisan Lapuk pada Area Rawan Longsor Menggunakan Metode Seismik Refraksi (Studi Kasus: Desa Kalirejo Kabupaten Kulonprogo)

Identifikasi Ketebalan Lapisan Lapuk pada Area Rawan Longsor Menggunakan Metode Seismik Refraksi (Studi Kasus: Desa Kalirejo Kabupaten Kulonprogo)

Geological Modelling of Lithosequent Based on Dem and Finite Element Method Inversion of Ves Data

Identification of surface layer structure using seismic refraction for landslide mitigation in Tandikek region, West Sumatra Indonesia

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