scholarly journals Optimation of Least Squares Methods Smooth Constrain Using Occam’s Inversion Geoelectric Resistivity Dipole-Dipole Consfiguration for Estimation Slip Surface

2019 ◽  
Author(s):  
Akmam Akmam ◽  
Irepia Refa Dona ◽  
Silvia Dona Sari
Keyword(s):  
Least Squares ◽  
Tilt Angle ◽  
Slip Surface ◽  
Inversion Methods ◽  
Slide Surface ◽  
Occam’S Inversion ◽  
Dipole Configuration ◽  
Geoelectrical Resistivity ◽  
Occam Inversion ◽  
Research Show

The volumes of the landslide depend on the depth of the slide surface. The depth of the slide surface can be predicted by using the least squares inversion methods of data geoelectrical. Method of Least Squares Inversion of the data Geoelectrical cannot get smooth results. Based on the above, the aims was optimalitation leastsquares smooth constrain inversion methods with Occam’s inversion for geoelectrical data and to determine the depth and tilt angle of the slide surface in in Bukit Lantiak Padang . This exploratory study was use the method Geoelectrical resistivity Dipole-Dipole configuration. The depth and tilt angle of the slide surface in Bukit Lantiak Padang was interpretated by combined Occam’s inversion with least-squares smooth constrain inversion methods. The type of slip surface is translation slip with 33.45 degrees in tilt angle and 19.3 meters in depth. Research show that the result interpretation by used combined Occam inversion with least-squares smooth constrain inversion methods more sharpness than least-squares smooth constrain inversion.

scholarly journals OPTIMITION OF LEAST SQUARES METHODS SMOOTH CONSTRAIN USING OCCAM’S INVERSION GEOELECTRIC RESISTIVITY DIPOLE-DIPOLE CONFIGURATION FOR ESTIMATION SLIP SURFACE

2018 ◽  
Author(s):  
Akmam Akmam
Keyword(s):  
Least Squares ◽  
Tilt Angle ◽  
Slip Surface ◽  
Inversion Methods ◽  
Slide Surface ◽  
Occam’S Inversion ◽  
Geoelectric Resistivity ◽  
Dipole Configuration ◽  
Occam Inversion ◽  
Result Interpretation

The volumes of the landslide depend on the depth of the slide surface. The depth of the slide surface can bepredicted by using the least squares inversion methods of data geoelectrical. Method of Least Squares Inversionof the data Geoelectrical cannot get smooth results. Based on the above, the aims was optimalitation leastsquaressmooth constrain inversion methods with Occam’s inversion for geoelectrical data and to determine thedepth and tilt angle of the slide surface in in Bukit Lantiak Padang . This exploratory study was use the methodGeoelectrical resistivity Dipole-Dipole configuration. The depth and tilt angle of the slide surface in BukitLantiak Padang was interpretated by combined Occam’s inversion with least-squares smooth constraininversion methods. The type of slip surface is translation slip with 33.450 tilt angle and 19.3 meters in depth.Research show that the result interpretation by used combined Occam inversion with least-squares smoothconstrain inversion methods more sharpness than least-squares smooth constrain inversion.

scholarly journals Identifikasi Bidang Gelincir di Dusun Dukuh, Desa Koripan, Kecamatan Matesih, Kabupaten Karanganyar, Menggunakan Metode Geolistrik Resistivitas Konfigurasi Wenner Alfa

2017 ◽  
Vol 6 (02) ◽  
pp. 88
Author(s):  
Irwan Romadon ◽  
Darsono D ◽  
Sorja Koesuma
Keyword(s):  
Slip Surface ◽  
Two Dimensional ◽  
Resistivity Method ◽  
Sandy Clay ◽  
Result Show ◽  
Configuration Data ◽  
Geoelectrical Resistivity ◽  
Clay Materials

<p>Slip surface identification in Dukuh, Koripan Village, Matesih Sub-district, Karanganyar District has been conducted with geoelectrical resistivity method with Wenner Alfa configuration. Data acquisitions was done on 5 sample lines. The length of each line is 75 meter. The smallest electrode spacing’s 3 meter, with multiplier (n) between 1 to 5. Two dimensional results show that slip surface in every sample lines formed by watertight wet clays material, with resistivity 8,99 Ωm until 13,4 Ωm. The depth of the slip surface in each line is varies. Slip surface of the line 1 was found at a depth of 1 meter to 3,7 meter, the line 2 was found at 2 meter to 4 meter, the line 3 was found at 0,75 meter to 3,78 meter, the line 4 was found at 1,5 meter to 3,5 meter, and the slip surface of line 5 was found at 0,75 meter to 3 meter. Three dimenisonal result show that the area with high land movement was covered by sandy-clay materials.</p>

scholarly journals PENENTUAN KEDALAMAN SUMUR BOR BERDASARKAN DATA GEOLISTRIK RESISTIVITAS DI BEBERAPA KAMPUNG DI KABUPATEN FAK-FAK

2018 ◽  
Vol 14 (1) ◽  
pp. 37-44
Author(s):  
Khristian Enggar Pamuji
Keyword(s):  
Water Layer ◽  
Water Source ◽  
Water Infiltration ◽  
Resistivity Sounding ◽  
Subsurface Geology ◽  
Resistivity Method ◽  
Groundwater Aquifers ◽  
Dipole Configuration ◽  
Geoelectrical Resistivity ◽  
Resistivity Image

Geoelectrical Resistivity method is a geophysical method that can be used to determine subsurface geology based on rock resistivity image. Resistivity survey has been done in some villages, in Fak Fak Regency, West Papua Province. The measurement method that used is sounding, whereas electrode configuration used is Dipole-dipole configuration with a stretch of 100 -150 m. The data obtained are then processed by Progress Res2Dinv. The results of this survey obtained show that in the resistivity sounding measurement point found any good groundwater aquifers, as the  water source of drilled well. Water layer with the thickness between 1-3 m at the surface (alluvial) is a rain water infiltration that is not recommended to make boreholes at this point.

scholarly journals Optimize of Least-Square Inverse Constrain Method of Geoelectrical Resistivity Wenner-Schlumberger for Investigation Rock Structures in Malalak Districts of Agam West Sumatra

2019 ◽  
Author(s):  
Akmam Akmam ◽  
Harman Amir; ◽  
Amali Putra
Keyword(s):  
Least Square ◽  
Inversion Method ◽  
Damping Factor ◽  
Slide Surface ◽  
Rock Structure ◽  
Wide Range ◽  
West Sumatra ◽  
Geoelectric Resistivity ◽  
Geoelectrical Resistivity ◽  
The City

Numerous studies have been conducted on an inversion method, focus on constraining factor,singuler value, speed of convergence. However, the result of inversion is not unique and bivalent. In this research, we optimize of Least-Square constrain by using damping factor. Th is method used for interpretation of the volumes and rock structure in Malalak Distric of Agam West Sumatra. This is undertaken because Malalak districts of Agam West Sumatra that passed by highway Padang and Bukittingi is a frequent area of landslide. Furthermore, the frequency of the landslide depends on the type of rock and the angle of the slope . The depth of the slide surface can be predicted by using the least squares inversion constrain method of Geoelectric Resistivity. Landslides resulted in disruption of transportation between the city of Padang and another district in Sumatra. Based on the above, to determine the rock's structure, the depth and tilt angle of the slide surface in Malalak districts Agam West Sumatra has to take place. Data obtained through Geoelectrical exploration using with automatic resistivitymeter equipment. Constrains were obtained using the Marquat inversion method. The result of the research is first, the damping factor for structures which have wide range resistivity is 0.02 and the smallest damping factor is 0.015. Second, the rock structure in Malalak of Agam consists of clay, sandstone, andesite, and limestone and dolomite. Implementation this research can be used to develop mitigation of landslide deserter.

scholarly journals The Estimation of Subsurface Structure within Geothermal Manifestation Area as an Outflow Zone Using Geoelectrical Resistivity Method in Tegal, Jawa Tengah

GeoEco ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Hangga Novian Adi Putra ◽  
Wahyudi Wahyudi
Keyword(s):  
Research Result ◽  
Soil Layer ◽  
Normal Fault ◽  
Geothermal Field ◽  
Geothermal System ◽  
Resistivity Method ◽  
Geothermal Fields ◽  
Dipole Configuration ◽  
Geoelectrical Resistivity ◽  
Manifestation Area

<p class="TesisTextOneHalfSpace"><em>Indonesia is one of the country having a lot of geothermal fields potentially used as a source of energy. For example, Java island is noted to have almost 57 geothermal fields. One of those geothermal fields which is rarely studied is Guci geothermal field. Hence, there was conducted a research to investigate the subsurface image and geothermal system in Guci geothermal field based on resistivity data. </em><em>The research in Guci geothermal field was carried out using geoelectrical method. Resistivity geoelectrical research used two configurations, namely dipole-dipole and schlumberger. Data acquisitions for dipole-dipole configuration was done in two lines, 500 metres spread for each line. Whereas the acquisitions for schlumberger configuration was done in four points, 200-250 metres spread for each point. </em><em>Research result showed that the area of geothermal manifestation in Guci consist of top soil layer, sandstone, andesite, and a fluids-containing layer. A fluids-containing layer is estimated to be related to geothermal manifestation in Guci and is a fault zone. Fault is estimated to be a normal fault and lies in 20 metres depth. Fault within geothermal manifestation area in Guci has a role as the pathway of hot-fluid out to the surface which forms a manifestation.</em></p>

scholarly journals Perbandingan Konfigurasi Wenner Alfa, Wenner-Schlumberger, Dipol-dipol Dan Pol-dipol Dalam Metode Geolistrik Tahanan Jenis Untuk Mendeteksi Keberadaan Air Tanah

Jurnal MIPA ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 29
Author(s):  
Juwana Puluiyo ◽  
As’ari ◽  
Seni H.J Tongkukut
Keyword(s):  
Water Resources ◽  
Data Processing ◽  
Execution Time ◽  
Resistivity Method ◽  
Dipole Configuration ◽  
Geoelectrical Resistivity ◽  
Resistivity Meter

Telah dilakukan penelitian untuk mencari konfigurasi yang paling tepat dalam eksplorasi sumber daya air (air tanah) dengan metode geolistrik tahanan jenis konfigurasi Wenner Alfa, Wenner-Schlumberger, Dipol-dipol dan Pol-dipol menggunakan Resistivity meter (multichannel and multielectrode resistivity and IP meter simultaneous channel merek MAE X612-EM). Pengukuran dilakukuan pada 4 lintasan dengan panjang bentangan 96 meter dan pengolahan data menggunggunakan perangkat lunak (softwere) RES2DINV.Hasil penelitian ini menunjukkan bahwa konfigurasi Dipol-dipol adalah konfigurasi yang paling efektif dan efisien dalam mendeteksi keberadaan air tanah dengan karakteristik : waktu eksekusi 24 menit, jumlah data 609 buah, kedalaman 16 meter dan jumlah data pereksekusi 5 titik.Research has been done to find the most appropriate configuration in the exploration of water resources (groundwater) with the geoelectrical Resistivity method of configuration Wenner Alfa, Wenner-Schlumberger, Dipole-dipole and Pole-dipole by using Resistivitymeter (multichannel and multielectric resistivity and IP meter simultaneous channel brand MAE X612-EM). Measurements were performed on 4 line with a stretch length of 96 meters and data processing used software RES2DINV.The results of this study indicate that Dipole-dipole configuration is the most effective and efficient configuration in detecting the presence of groundwater with the characteristics : 24 minutes execution time, 609 pieces of data, 16 meters depth and 5 points of execution data.

scholarly journals Metode Geolistrik Konfigurasi Dipole-Dipole Untuk Penetapan Bidang Gelincir Gerakan Tanah di Jajaway, Palabuhanratu, Sukabumi

2021 ◽  
Vol 12 (1) ◽  
pp. 47
Author(s):  
Shinta Kiky Rachmawati ◽  
Yayat Sudrajat ◽  
Lina Handayani ◽  
Dadan Dani Wardhana
Keyword(s):  
Data Acquisition ◽  
Potential Risk ◽  
Slip Surface ◽  
The Other ◽  
Ground Movement ◽  
Clay Layer ◽  
Surface Data ◽  
Resistivity Model ◽  
Dipole Configuration ◽  
East West

ABSTRAKGerakan tanah di kompleks perkantoran Kabupaten Sukabumi di Jajaway, Palabuhanratu, terjadi di luar perkiraan dan perencanaan pembangunan sebelumnya. Untuk melihat kondisi dan luasan daerah gerakan tanah dan dalam usaha mengurangi resiko kerugian lebih besar, diperlukan identifikasi bidang gelincir gerakan tanah di kompleks tersebut. Bidang gelincir dicari berdasarkan model tahanan jenis yang diperoleh dari survei pengukuran geolistrik. Akuisisi data dilakukan pada 7 lintasan, dengan 6 lintasan berarah utara-selatan dan 1 lintasan berarah barat-timur. Metode akusisi yang digunakan adalah tahanan jenis multielektrode dengan konfigurasi dipole-dipole. Hasil penelitian membuktikan bahwa kondisi perlapisan batuan lepas tetapi lebih berat di atas lapisan lempung merupakan salah satu penyebab kejadian pergerakan tanah. Kejadian itu sangat terlokalisir karena kondisi seperti itu tidak ditemukan pada lintasan lainnya.Kata kunci: bidang gelincir, geolistrik, gerakan tanah, konfigurasi dipole-dipole, tahanan jenisABSTRACTGround movement in the Sukabumi Regency office complex (Jajaway, Palabuhanratu), occurred unexpectedly. To reduce the potential risk, we need to identify the slip surface to detect the possibility of more landslides. The resistivity model by the dipole-dipole geoelectrical method was applied to find the slip surface. Data acquisition was carried out in 7 lines: 6 north-south lines and 1 east-west line. The resistivity models present the distribution of resistivity below the surface. Above this clay layer, there is a higher resistivity layer, which is related to sandy tuff and breccia. The condition might cause the previous creeping type of ground movement. The type of layering is not found in the other lines. Therefore we do not expect a similar ground movement would occur in those lines.Keywords: dipole-dipole configuration, geoelectrical, landslide, resistivity, slip surface

scholarly journals Investigasi Bidang Gelincir Tanah Longsor Menggunakan Metode Geolistrik Konfigurasi Dipol-dipol Sebagai Upaya Mitigasi Bencana Alam di Kabupaten Minahasa

Jurnal MIPA ◽  
2018 ◽  
Vol 7 (2) ◽  
pp. 33
Author(s):  
As'ari _ ◽  
Seni H.J Tongkukut ◽  
Gerald H. Tamuntuan
Keyword(s):  
Slip Surface ◽  
Measurement Data ◽  
Line Length ◽  
Influential Factors ◽  
Southern Region ◽  
Shear Surface ◽  
Main Road ◽  
Resistivity Method ◽  
Geoelectric Resistivity ◽  
Dipole Configuration

Kondisi geografis Kabupaten Minahasa merupakan pegunungan dan perbukitan, jalan utama sebagai sarana akses transportasi yang menghubungan daerah bagian selatan dengan ibukota Provinsi Manado berada di lereng-lereng pegunungan ini. Telah terjadi longsor di beberapa tempat dan menutupi jalan utama. Salah satu faktor penyebab longsoran yang sangat berpengaruh adalah bidang gelincir atau bidang geser.  Guna mengantisipasi terjadinya bencana tanah longsor maka sangat penting untuk dilakukan eksplorasi geolistrik untuk inventarisasi data dan informasi potensi terjadinya bencana tanah longsor. Telah dilakukan eksplorasi untuk mengetahui potensi tanah longsor dengan menginvestigasi keberadaan bidang gelincir di Jalan Manado Tomohon. Eksplorasi menggunakan metode geolistrik resistivitas konfigurasi dipol-dipol. Pengukuran dilakukan menggunakan resistivitymeter MAE X612 EM pada 4 lintasan, lintasan 1-4 menggunakan 24 elektroda dan spasi 10 m dengan panjang lintasan 240 m. Data pengukuran diolah menggunakan software RES2DINV, hasil pengolahan berupa tampang lintang resistivitas 2 dimensi. Bidang gelincir diidentifikasi dengan resistivitas (30 - 215) Ωm, yang merupakan lapisan lempung pasiran. Bidang gelincir ditemukan pada semua lintasan, pada lintasan 1, 3 dan 4 terdapat 2 lapisan dengan kedalaman sampai 23 m. Lintasan 2 bidang gelincir teridentifikasi tersebar pada 3 lokasi dengan kedalaman mencapai 20 m.The geographical conditions of Minahasa Regency are mountains and hills, the main road as a means of transportation access that connects the southern region with the capital of Manado Province on these mountain slopes. Landslides have occurred in several places and covered the main road. One of the most influential factors for landslides is the slip surface or shear surface. To anticipate landslides, it is very important to explore geoelectricity for an inventory of data and information on potential landslides. Exploration has been carried out to determine the potential of landslides by investigating the existence of slip surface on Jalan Manado Tomohon. Exploration using geoelectric resistivity method dipole-dipole configuration. Measurements were made using MAE X612 EM resistivitymeter on 4 lines, line 1-4 using 24 electrodes and 10 m spacing with 240 m line length. Measurement data is processed using RES2DINV software, the results of processing are 2-dimensional resistivity crossection. The slip surface is identified by resistivity (30 - 215) Ωm, which is a layer of sandy clay. The slip surface is found on all lines, on lines 1, 3 and 4 there are 2 layers with a depth of up to 23 m. Slip surface at line 2 are identified spreading over 3 locations with depths reaching 20 m.

scholarly journals Identifikasi Bidang Gelincir Pemicu Bencana Tanah Longsor Dengan Metode Resistivitas 2 Dimensi Di Desa Pablengan Kecamatan Matesih Kabupaten Karanganyar

2016 ◽  
Vol 2 (02) ◽  
pp. 51
Author(s):  
Darsono D ◽  
Bambang Nurlaksito ◽  
Budi Legowo
Keyword(s):  
Data Processing ◽  
Slip Surface ◽  
Research Area ◽  
Clay Layer ◽  
Resistivity Method ◽  
Central Java ◽  
Sandy Clay ◽  
Value Range ◽  
Geoelectrical Resistivity ◽  
Central Java Province

<span>Investigation of landslide slip surface has been conducted at Salaman Sub village, <span>Pablengan Village, Matesih District, Karanganyar Regency, Central Java Province by using <span>dipole-dipole array geoelectrical resistivity method. Data processing were using Res2Dinv <span>version 3.45 (semi demo version) software. The interpretation result showed that at the <span>research area was found lithology consist i.e. clay, wet clay, sandy clay until claysand, sand <span>until breccia. The slip surface is a wet clay layer with resistivity value range from 19.3 Ω m <span>to 36.6 Ω m, for one section was found with depth of 1.7 meter until 17 meters, and for two <span>section was found with depth of 8.9 until 16.4 meters.</span></span></span></span></span></span></span><br /></span>

Sign in / Sign up

Export Citation Format

Share Document