Articles
<![CDATA[Identifikasi Intrusi Air Laut Pada Air Tanah Menggunakan Metode Induced Polarization Studi Kasus Daerah Surabaya Timur ]]>
<![CDATA[Bagas Aryaseta]]>;
<![CDATA[Dwa Desa Warnana]]>;
<![CDATA[Amien Widodo]]>
<![CDATA[ Jurnal Geosaintek Vol 2, No 3 (2016) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25023659.v2i3.2103
<![CDATA[Sebagian besar air tanah di wilayah kota Surabaya sudah mengalami intrusi air laut dan memiliki kadar garam yang tidak sesuai standar air minum. Permasalahan akifer air tanah yang sudah terintrusi air laut diidentifikasi menggunakan metode Induced Polarization dilengkapi dengan data sumur dan data resistivity sebagai data pelengkap. Pengukuran data sumur dilakukan di beberapa lima belas titik di Surabaya Timur yang hasilnya menunjukkan parameter-parameter air seperti salinitas, TDS, konduktivitas, dan pH. Pengukuran Induced Polarization dan Resistivity metode Wener-Schlumberger dilakukan di tiga lintasan di Surabaya Timur yang tersebar di daerah air asin, air payau rendah, dan air tawar. Penampang Chargeability dan Resistivity memiliki penetrasi kedalaman 9 m menunjukkan hasil yang cukup baik dalam mengidentifikasi akifer air tanah. Akifer dengan nilai resistivitas rendah (6.81 ohm.m) dan chargeabilitas rendah (<0.302 msec) besar kemungkinan merupakan air asin.]]>
<![CDATA[Risk Management Effectiveness of Oil And Gas Pipeline Construction in Java Island - Indonesia ]]>
<![CDATA[I Putu Artama Wiguna]]>;
<![CDATA[Nadjadji Anwar]]>;
<![CDATA[Amien Widodo]]>;
<![CDATA[Nova Nevila Rodhi]]>
<![CDATA[ IPTEK Journal of Proceedings Series No 6 (2017): The 3rd International Conference on Civil Engineering Research (ICCER) 2017 ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23546026.y2017i6.3308
<![CDATA[One of the important oil and gas industry is oil and gas pipeline which serves to support the gas transmission and distribution process. The oil and gas pipeline routes are so long and cross through some areas that certainly raises the risk of adversely affecting the environment, especially for the pipeline located in a densely populated area, where at certain conditions, the pipe can leak and may cause the explosion. Many researches have been conducted concerning on the project pipeline risks which concluded that the oil and gas pipeline project has very complex risks. In addition, the oil and gas project may cause a potential disaster. Currently oil and gas companies have been implementing risk management to minimize the negative impacts, but the negative impacts are still occurred. This is due to ineffective risk management implementation. This study aims to analyze the effectiveness of risk management system for oil and gas pipeline project in Java Island. Based on a deep study literature review, it shows that the effectiveness of risk management can be achieved by taking account into environmental, social and economic factors that are the pillars of sustainable development system. The potential disaster was also to be considered as an addition factor. Therefore, four identified factors were analyzed using Analytical Hierarchy Process (AHP) method. Data were obtained using questionnaire which were distributed to oil and gas project team. It is found that the most factors to be considered was social aspect (40%) and the other factors contributed 31% for disaster, 15% for economic, 14% for environment. Those factors should be taken account in the design stage as the most priority.]]>
<![CDATA[3D Resistivity Data Modelling to Identify Aquifer Geometry by Qualitative Analysis (Field Study: PDAM Surabaya Groundwater Conservation Area, Pasuruan) ]]>
<![CDATA[Ayi Syaeful Bahri]]>;
<![CDATA[Amien Widodo]]>;
<![CDATA[Widya Utama]]>;
<![CDATA[Dwa Desa Warnana]]>;
<![CDATA[Pegri Rohmat Aripin]]>;
<![CDATA[Adib Banuboro]]>;
<![CDATA[Robi Alfaq Abdillah]]>
<![CDATA[ IPTEK Journal of Proceedings Series No 6 (2017): The 3rd International Conference on Civil Engineering Research (ICCER) 2017 ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23546026.y2017i6.3249
<![CDATA[The resistivity method is one of the geophysical methods used to identify the aquifer layer by utilizing the rock response to the flow of electric current. This method considered more effective and can give a good subsurface cross-section, especially the fluid response. In this research, 3D modelling for identify geometry of subsurface geological structures of this study focus in three area (Plintahan, Duren Sewu, and Karangjati) using 2D resistivity data. Data Measurement of 2D resistivity using Wenner-Schlumberger configuration with length of each line is 155 meters and the target depth is 30 meters. The purpose of this configuration is to get an inverse with a resolution that is good to the lateral and vertical. The results show that the types of rocks in the research area was clay, sand and sandy shale with resistivity value 50-150 ohm-meter where sand rocks interpreted as aquifer rocks at depths of 2-7 meters and a thickness of 2-5 meters. The result of the resulting 3D modelling showed that the aquifer layer in Plintahan area showed the geological continuity with anticline geometry, in another area the aquifer layer in Durensewu - Karang Jati area showed the aquifer geometry prediction but there is no continuity of the structure of each other.]]>
<![CDATA[Resistivity Tunnel Monitoring System ]]>
<![CDATA[Firman Syaifuddin]]>;
<![CDATA[Amien Widodo]]>;
<![CDATA[Muhammad Nurul Puji]]>
<![CDATA[ IPTEK Journal of Proceedings Series No 2 (2018): The 2nd Conference on Innovation and Industrial Applications (CINIA 2016) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23546026.y2018i1.3409
<![CDATA[The development of an urban area must be supported by the construction of infrastructure such as public facilities. The crowded of urban area in Indonesia increasingly requires the existence of a mass transportation mode that is capable of carrying passengers in large amounts and relatively quickly. Recently Jakarta has proposed the construction of the MRT (Mass Rapid Transit) with underground lines utilize tunnel technology. Tunnel system was chosen as an alternative solution socioeconomic problems in the land problem and conditions of the existing urban planning. The geographical position of Indonesia is located in the equatorial zone which is the weather conditions have high levels of weathering and moisture or high humidity, this condition may result in changes in the level of strength of rock of the tunnel system in a relatively fast. In the construction of public facilities with the tunnel system need monitoring system the condition of the tunnel to avoid the dangers that may occur due to the failure of a tunnel system. To determine the level of moisture and water content in the rock or overburden a tunnel can be determined by utilizing the resistivity method. Resistivity method is a geophysical method that measures the magnitude of the resistivity of a material. Changes in moisture content and humidity levels of rock or soil in an area can be indicated by a change in the value of resistivity of rock or soil. In the measuring of the resistivity method needed good design to provide accurate information, especially if it will be used as a monitoring system for a tunnel. Development of measuring the resistivity method, and in particular data processing is done with the aim of optimizing the measurement process and the measurement results can be interpreted easily and be able to demonstrate a phenomenon that occurs in rocks or soil cover tunnel.]]>
<![CDATA[Tsunami Risk Mapping of Lumajang District Using Geographic Information System (GIS) ]]>
<![CDATA[Amien Widodo]]>;
<![CDATA[Dwa Desa Warnana]]>;
<![CDATA[Juan Pandu Gya Nur Rochman]]>;
<![CDATA[Firman Syaifuddin]]>;
<![CDATA[Erik Sapta Perbawa]]>;
<![CDATA[Ary Iswahyudi]]>;
<![CDATA[Wien Lestari]]>
<![CDATA[ IPTEK Journal of Proceedings Series No 6 (2017): The 3rd International Conference on Civil Engineering Research (ICCER) 2017 ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23546026.y2017i6.3285
<![CDATA[Indonesia lied among the three of world major plates so that several districts along the southern coast of Java Island were vulnerabled to the tsunami including Lumajang. South coast of Lumajang had high population density and settlements and high levels of government and economic activity. Therefore, it is necessary to know the level of insecurity and vulnerability to the tsunami in order to be utilized as input of mitigation data for the preparation of regional spatial plans (RTRW) based on tsunami risk level. The objective of this research is to arrange the regional risk map for tsunami in Lumajang Regency using Geographic Information System (GIS) through approach of insecurity and vulnerability analysis of tsunami. The insecurity rate is analyzed based on seismicity map and run-up data of tsunami event in Lumajang District. Vulnerability approach used multicriteria such as land elevation, slope, coastal morphometry, land use, distance from the coast and distance from the river. The methodology that was used included data collections of both primary and secondary data such as satellite imagery of earth map, Lumajang statistical data. Each vulnerability data variable was processed to result a weighting and scores that its become the parameters for making a regional tsunami vulnerability map. The results showed three level of risks in five subdistricts that directly adjacent to the Southern Coast such as Yosowilangun, Kunir, Tempeh, Pasirian, and Tempursari. The high tsunami risk which covered almost along the coast, the ramps morphology, without any protective vegetation and human activities at the site while the medium of tsunami risk which were in areas with elevation more higher than the coastal and the low of tsunami risk had variations of topography, quite far from the coast and less human activities.]]>
<![CDATA[Web-Based Tsunami Early Warning System ]]>
<![CDATA[Daniel Siahaan]]>;
<![CDATA[Royke Wenas]]>;
<![CDATA[Amien Widodo]]>;
<![CDATA[Umi Yuhana]]>
<![CDATA[ IPTEK The Journal for Technology and Science Vol 24, No 3 (2013) ]]>
Publisher : <![CDATA[IPTEK, LPPM, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j20882033.v24i3.552
<![CDATA[Tsunami is a serious threat to the island nation such as Indonesia. The tsunami disasters that were occurred in some parts of Indonesia have immerged the need for tsunami early warning system that is reliable and can be applied to the Indonesian archipelago. North Sulawesi is one of the areas prone to tsunamis since this area lies in the path called the ring of fire's. This article describes a tsunami simulation application for the north coast of North Sulawesi. Web-based applications were built so that they can be monitored online from anywhere and at anytime. This system reads the real-time seismic data that affect the North Sulawesi region from a number of sources. Dynamic and static data that are received are processed using data mining method to predict the chances of a tsunami, while flood flooding algorithm is used to visualize the map of affected areas of North Sulawesi. The resulting information is available in detail in the form of web pages and also through short message to the relevant authorities handling of the tsunami disaster in order for them to act in accordance with applicable standard operating procedures. With this application, the public can obtain information that is more accurate. Relevant authorities can conduct tsunami disaster mitigation measures more effectively.]]>
<![CDATA[Identification of Soil Contamination using VLF-EM and Resistivity Methods: A Case Study ]]>
<![CDATA[Rahmatun Inayah]]>;
<![CDATA[Bagus Jaya Santosa]]>;
<![CDATA[Dwa Desa Warnana]]>;
<![CDATA[Firman Syaifuddin]]>;
<![CDATA[Juan Pandu Gya Nur Rochman]]>;
<![CDATA[Wien Lestari]]>;
<![CDATA[Amien Widodo]]>
<![CDATA[ IPTEK The Journal for Technology and Science Vol 30, No 1 (2019) ]]>
Publisher : <![CDATA[IPTEK, LPPM, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j20882033.v30i1.5004
<![CDATA[Hazardous waste is a waste with properties which can pollute and damage the environment, human health, and other living things. Lakardowo is a village that is suspected of being contamination by hazardous waste derived from industrial activities. Measurements with the VLF-EM and Resistivity method were used in this study. In addition, ground water level mapping and soil sampling in locations around the industry were conducted for the XRF test. Groundwater mapping results show that groundwater flow lead to the Northeast-South and Southwest of the industrial site. The soil samples that have been tested by XRF show the presence of heavy metals, wherein hazardous wastes generally contain various types of heavy metals that are conductive or have low resistivity values. Quantitative interpretation of VLF-EM data shows the presence of low resistivity anomalies at several measurement sites, which are suspected to have been contaminated with soil by waste. Resistivity data processing results, showing a low resistivity anomaly (≤ 3 Ω.m) located to the north (near an industrial site) and spreading towards the southwest along the measurement path. The result of a combination of quantitative interpretations of both methods, obtained, the direction of anomalous flow of hazardous waste moves southeastward and towards deeper soil coating following the direction of rock coating.]]>
<![CDATA[Identifikasi Awal Model Akuifer pada Mata Air Umbulan dengan Menggunakan Geolistrik Konfigurasi Schlumberger ]]>
<![CDATA[Tatas Tatas]]>;
<![CDATA[Mahendra A M]]>;
<![CDATA[Siti Kamilia Aziz]]>;
<![CDATA[Amien Widodo]]>
<![CDATA[ Jurnal Aplikasi Teknik Sipil Vol 12, No 1 (2014) ]]>
Publisher : <![CDATA[Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya ]]>
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DOI: 10.12962/j12345678.v12i1.2587
<![CDATA[Bencana kekeringan, saat ini menjadi salah satu bencana yang selalu datang setiap tahun di beberapa wilayah Indonesia. Tahun 2011, Badan Nasional Penanggulangan Bencana (BNPB) menyatakan bahwa bencana kekeringan mengancam produksi pangan nasional. Salah satu bentuk dari bencana kekeringan tersebut adalah berkurangnya debit atau bahkan matinya mata air. Mata Air Umbulan merupakan mata air yang memiliki potensi yang cukup besar dengan debit sebesar 4000-5000 liter/detik, dapat dijadikan sebagai sumber air baku. Terkait dengan potensi yang sangat besar tersebut maka perlu dipelajari bagaimana struktur geologi yang menjadi wadah bagi air tanah tersebut (hidrogeologi). Hal tersebut untuk dijadikan sebagai dasar untuk mengetahui perilaku air yang menjadi sumber Mata Air Umbulan. Salah satu metode yang dapat digunakan untuk mengetahui struktur hidrogeologi adalah dengan menggunakan geolistrik. Berdasarkan hasil pengukuran resistivitas struktur batuan maka dapat diperoleh kesimpulan bahwa nilai resistivitas batuan penyusun pada area penelitian berkisar antara 1–4800 Ωm. Berdasarkan hasil interpretasi geolistrik, batuan penyusun area penelitian berupa pasir, pasir tufan, breksi, breksi berpasir, tuf berpasir dan tuf. Lapisan yang berfungsi sebagai penahan air atau lapisan kedap adalah lapisan tuf, tuf berpasir, dan lava. Lapisan yang berfungsi sebagai akifer adalah lapisan pasir, pasir tufan, breksi dan breksi berpasir dengan kedalaman antara 25-125 meter.]]>
<![CDATA[Identifikasi Dugaan Situs Purbakala Menggunakan Metode Geolistrik Resistivitas Konfigurasi Wenner di Situs Alassumur, Kabupaten Bondowoso ]]>
<![CDATA[Juan Pandu Gya Nur Rochman]]>;
<![CDATA[Amien Widodo]]>;
<![CDATA[Thufeil Amr Adausy]]>;
<![CDATA[Hanif Dhiyaz Ulhaq F]]>
<![CDATA[ INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): IJAP Volume 12 ISSUE 01 YEAR 2022 ]]>
Publisher : <![CDATA[Department of Physics, Sebelas Maret University ]]>
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DOI: 10.13057/ijap.v12i1.54349
<![CDATA[Penemuan struktur batubata kuno di Desa Alas Sumur, Kecamatan Pujer Kabupaten Bondowoso menjadi menarik untuk diteliti, karena selama ini Kabupaten Bondowoso umumnya berupa peninggalan zaman batu besar yaitu Situs Megalithikum. Tujuan penelitian ini adalah untuk identifikasi struktur batu bata di situs tersebut. Metode yang digunakan adalah metode geolistrik konfigurasi wenner yang dapat menggambarkan kondisi bawah permukaan dan dugaan stuktur batu bata berdasarkan perbedaan nilai resistivitas batuan. Jumlah Lintasan pengukuran sebanyak 4 lintasan, dengan panjang untuk lintasan 1,3, dan 4 sepanjang 48 meter dengan spasi 1 meter sedangkan lintasan 2 sepanjang 96 meter dengan spasi 2 meter. Data hasil pengolahan berupa data penampang nilai resistivitas. Berdasarkan hasil pengolahan, didapatkan litologi batuan breksi, batuan andesit, dan lempung pasiran. Persebaran nilai resistivitas batuan breksi memiliki range nilai (34 – 101 Ωmeter), batuan andesit memiliki range (102 – 141 Ωmeter), batuan lempung pasiran memiliki range ( 26 – 33 Ωmeter), anomali terdeteksi dengan range nilai (19 - 25Ωmeter) sebagai batubata. Anomali tersebut terdapat pada lintasan 1, 3, dan 4. Penemuan anomali tersebut diharapkan dapat membantu pihak terkait untuk melakukan proses pengembangan selanjutnya.]]>
<![CDATA[Rancang Bangun Sistem Monitoring Pergerakan Tanah Menggunakan Metode Multi Segment Inclinometer Berbasis Accelerometer (Studi Kasus Model Lereng) ]]>
<![CDATA[Hamzah Afif]]>;
<![CDATA[Amien Widodo]]>;
<![CDATA[Juan Pandu Gya Nur Rochman]]>;
<![CDATA[Firman Syaifuddin]]>
<![CDATA[ Jurnal Geosaintek Vol 5, No 1 (2019) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j25023659.v5i1.4732
<![CDATA[Telah dilakukan rancang bangun alat monitoring pergerakan tanah dengan parameter yang dipantau antara lain perubahan sudut dan kadar kelembaban tanah. Metode yang digunakan adalah multi segment inclinometer yang dinilai lebih efektif karena dapat membaca pergerakan tanah melalui perubahan sudut yang bervariasi terhadap kedalaman. Prototype alat berupa multi segment inclinometer berbasis Arduino Mega 2560 sebagai mikrokontroler. Perubahan sudut diukur menggunakan inclinometer berbasis accelerometer MPU 6050 dan kadar kelembaban tanah diukur menggunakan moisture sensor dari DfRobot. Prototype alat dan sistem yang dibangun pada penelitian ini menggunakan hardware dan software dengan lisensi open source sehingga pembuatannya lebih mudah dan murah. Prototype alat diuji pada sebuah model lereng. Uji yang dilakukan yaitu uji pengaruh sudut dan uji penambahan air. Hasil uji pengaruh sudut sebelum longsor terjadi perubahan sudut sebesar 6° dalam setengah detik. Pada uji penambahan air perubahan sudut sebesar 7°-12° dalam setengah detik. Peruabahan kadar air sebelum terjadi longsor sebesar 21%. Data yang diperoleh dari sensor ditampilkan secara real time menggunakan antarmuka Processing dan disimpan dalam bentuk .csv. Hasil analisa data menunjukkan sistem monitoring yang telah dibuat dapat membaca indikasi terjadinya longsor.]]>
