APLIKASI METODE GEOLISTRIK TAHANAN JENIS KONFIGURASI WENNER-SCHLUMBERGER UNTUK SURVEY PIPA BAWAH PERMUKAAN

Metode geolistrik tahanan jenis merupakan salah satu dari metode geofisika yang dapat mendeteksi aliran listrik di bawah permukaan bumi. Salah satu aplikasi metode geolistrik tahanan jenis adalah dapat mengidentifikasi keberadaan pipa di bawah permukaan.Penelitian ini menggunakan metode geolistrik tahanan jenis dengan konfigurasi Wenner–Schlumberger. Metode Wenner–Schlumberger adalah metode dengan sistem aturan spasi yang konstan dengan catatan faktor pengali ’n’ adalah perbandingan jarak antara elektroda C1-P1 atau (C2-P2) dengan P1-P2. Instrumen yang digunakan adalah resistivitymeter yang dilengkapi dengan empat  buah elektroda yang memiliki kemampuan dalam pembacaan output respon tegangan akibat arus yang diinjeksikan ke dalam permukaan pasir melalui dua buah elektroda arus dan dua buah elektroda potensial. Masukan instrumen tersebut berupa sumber tegangan DC sebesar 12 volt. Dalam penelitian ini digunakan sofware Res2Dinv untuk memetakan  isoresistivity 2D di bawah permukaan yang diukur. Dari hasil penelitian ini diperoleh nilai resistivitas pipa sebesar 181.654 ?m yang berada pada rentang nilai resistivitas pipa yang diamati sebesar 105 - 107 ?m.<br /

Program Penerapan Mitigasi Bencana Gempa Bumi Di Ponpes Nurul Wathan Lombok Tengah NTB Berorientasi Pada Penurunan Magnet Bumi Akibat Pergerakan Sesar Patahan

The program that was implemented at Nurul Wathan (NW) was the result of research at the Rembitan Observatory to measure the earth's magnetism using a device called Proton. The international unit for measuring the earth's magnetism is the Tesla, specifically the nTesla earth magnet (Nano Tesla). The stages of implementing the solution are adjusted to the characteristics of the stages of the disaster cycle. During a disaster, full of activities in an emergency situation, post-disaster, reduce the complexity of the problems in reconstruction and rehabilitation. Pre-disaster requires thorough planning. Communities that are exposed to disasters are very diverse. For those who have been educated or those who have not received formal education, they need to understand the importance of disaster risk reduction (DRR)

Program Mitigasi Bencana Banjir dan Tanah Longsor Akibat Cuaca Ekstrim di Desa Sade Lombok Tengah NTB

The condition of the situation in Sade Village is a hill, slope and mountainous area with and has a marble of more than 20 degrees, a thick layer of soil above the hillside, there is a poor water and land use system, resulting in flooding and landslides. The incident occurred in early 2021. This was carried out by a community service program to anticipate the possibility of floods and landslides due to extreme weather. This service was carried out by the Research Group on Electro Magnetic Technology and Environmental Conservation for Humanity. One of the missions related to the village community is towards Tangguh Bencara Village (DESTANA).

Pemberdayaan Masyarakat Desa Sade Dalam Kesiapan Desa Tangguh Bencana Banjir dan Tanah Longsor

The Mandalika area has become an area of ​​global concern because it has a GP motorcycle racing circuit. Mandaika is geographically closely related to the 9 buffer villages. The village is Sade Village, which is a unified area that must be maintained due to the land being taken as backfill for the circuit construction area. Changes in land use are a threat that is already in sight due to the land becoming barren, it is necessary to provide knowledge about the dangers of disasters such as floods and landslides due to extreme weather. The obligation to provide knowledge on the dangers of flooding and landslides has been carried out with the help of funds from the DPP SPP Electrical Engineering, University of Mataram, through the Community Service program carried out by the research group on Electromagnetic Technology and Environmental Conservation for Humanit

Analisis Big Data Geomagnetik Dengan Metode Diferensiasi Sebagai Prekursor Gempa Lombok Tahun 2018

Lombok is an area with the highest geomagnetic anomaly in Indonesia (Zubaidah et al., 2014). From the end of July to the end of August 2018, Lombok experienced a series of fairly large earthquakes. Identification of geomagnetic signals, especially in the Ultra Low Frequency (ULF) spectrum, can be used as earthquake precursors (Saroso, 2010). Intermagnet IAGA (International Aeronomy Geomagnetic Association) is a network of international geomagnetic observatory stations that have large world geomagnetic data. Big data analysis is very important because very large information is needed in disaster mitigation. This study uses geomagnetic data per second for 24 hours from 28 August to 30 November 2018 taken from Kakadu (KDU) Australia and Nurul Bayan Station (NRB) Lombok. The analytical method used is Differentiation by calculating the F value (total magnetic field) for KDU and NRB, then look for the difference and analyze the pattern. The results found that there was an anomaly phenomenon of the Earth's magnetic field in Nurul Bayan Lombok which was detected for 17 days during October 2018. 

SOSIALISASI POTENSI ENERGI TERBARUKAN ANGIN (BAYU) ANTARA UNIVERSITAS MATARAM (UNRAM) BEKERSAMA DENGAN UVERSITAS TEKNOLOGI SUMBAWA (UTS) DI PULAU SUMBAWA

National Energy Policy, is to increase energy diversification through efforts to use renewable energy such as renewable non-fossil fuels, especially wind energy until 2025. By utilizing renewable energy, the dependence on fossil fuels on the national energy supply system can decrease. Sumbawa Island has the potential for wind energy around 220 KW (assuming each location is built 10 units

PENGUKURAN RESISTIVITAS PADA DAERAH DUGAAN SUMBER PENYEBAB ANOMALI GEOMAGNETIK DI PULAU LOMBOK NTB

possibilities of the source of geomagnetic anomaly in Lombok Island, i.e. a specific local structure composed by a quite large magnetic body or a local fault in this region that could be associated with a source of seismic hazard (especially earthquakes). An interesting profile could be estimated lie around the minimum geomagnetic anomaly (8045’36”S, 11601’48”E) to the maximum one (8043’48”S, 1160 5’24” E). Understanding the corresponding structure on that profile is very important - related to the possibility of the source of geomagnetic anomaly in Lombok Island - in order to get further information about potentially local fault in this region as a source of earthquakes hazard. Geoelectric method with vertical electrical sounding (VES) configuration have been applied in this profile, on three VES points (i.e. one point between the minimum and the maximum geomagnetic anomaly (X1: 8046’42.9”S, 116004’07.7”E), and two other points outside (X2: 8046’03.3”S, 115058’39.9”E; which is on negative anomaly area) and (X3: 8042’11.6”S, 116008’27.2”E; which is on positive anomaly area). The potency of X1 as a critical zone has been shown, with the existence of resistivity contrast in this area, which its resistivity value between X2 (very high resistivity; r &gt;25,000 Wm) and X3 (very low resistivity; ; r &gt;1 W m). This results lead to the potentially local fault in this region as a source of earthquakes hazard.</p

Investigasi Tingkat Kerawanan Gedung Dalam Rangka Implementasi Mitigasi Gempa Bumi di Fakultas Teknik Universitas Mataram

After the 2018 Lombok Earthquake, buildings at the Faculty of Engineering, University of Mataram (FT Unram) were severely damaged and there was no comprehensive treatment. Facilities for earthquake mitigation are still minimal and if available they are not designed and placed properly. Some parts of the building have been renovated but appear unfinished, while there were new constructions that have not been investigated regarding their suitability with earthquake mitigation. Anticipating re-occurrence of a major earthquake in Lombok, it is very necessary to implement earthquake mitigation at FT Unram. In this paper, results of vulnerability investigation of each building will be presented including number, type, and level of damages as well as their locations and detailed documentation of each point of damages in form of pictures and photos/videos. Through this activity vulnerabilities of each building can be identified comprehensively, so that appropriate treatments can be carried out, and the safest evacuation route can be planned as well

Program Air Siap Minum Untuk Siswa dan Penduduk Terdampak Gempa di Sekolah Dasar Nengeri 3 Malaka Teluk Nara Pemenang, Kabupaten Lombok Utara

Since the magnitude 7 magnitude earthquake occurred in August 2018, Lombok Island, especially North Lombok Regency, has been severely affected by infrastructure damage. From the data available, there are very few sources of clean water and are scarce. For this reason, in March 2019 the University of Mataram Community Service Team was represented by PUI Geomagnetic together with the largest water pump company in the world, Xylem Inc. installed a water pump at SDN 3 Teluk Nara Pemenang. The result of pumping water is clean water ready to drink

PEMODELAN FISIKA APLIKASI METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER UNTUK INVESTIGASI KEBERADAAN AIR TANAH

Pada penelitian ini telah dilakukan suatu pemodelan físika aplikasi metode geolistrik konfigurasi Schlumberger untuk investigasi keberadaan air tanah. Pemodelan dilakukan pada suatu bak kaca yang diisi dengan pasir dan tanah liat sebagai host-rock dengan injeksi air tanah untuk berbagai volume. Hasil inversi 2-D menggunakan perangkat-lunak IP2WIN menunjukkan bahwa metode geolistrik konfigurasi schlumberger dapat digunakan untuk mengetahui migrasi air tanah. Hal ini dapat dilihat dari perubahan penampang isoresistivitas sebelum dan sesudah injeksi air dengan jumlah yang berbeda, terutama pada titik injeksi air dalam hal ini Titik 3 yang memiliki nilai resistivitas paling rendah (bersifat konduktif). Resistivitas ini berada pada range resistivitas air tanah yaitu antara 0,5 sampai 300 ohm meter (Telford, 1990).<br /