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All Journal IJOG : Indonesian Journal on Geoscience Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan JGE (Jurnal Geofisika Eksplorasi) Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir JOURNAL ONLINE OF PHYSICS Jurnal Geocelebes Journal of Geoscience, Engineering, Environment, and Technology JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) BULLETIN OF THE MARINE GEOLOGY Journal of Engineering and Scientific Research (JESR) Jurnal Geofisika GEOGRAPHY : Jurnal Kajian, Penelitian dan Pengembangan Pendidikan Seandanan: Jurnal Pengabdian pada Masyarakat Indonesian Journal of Spatial Planning Jurnal Riset Fisika Indonesia Journal of Geology and Exploration JURNAL TEKNIK GEOLOGI : Jurnal Ilmu Pengetahuan dan Teknologi JAGE Jurnal Mitrawarga GEMBIRA (Pengabdian Kepada Masyarakat) OPHIOLITE : Jurnal Geologi Terapan Bulletin of Geology Jurnal Geosaintek
Rahmi Mulyasari
Universitas Lampung
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences Other

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Perbandingan Indeks Kerentanan Seismik Antara Instrumen Akselerometer ADXL345 Dengan REFTEK 130-SMHR Menggunakan Metode Horizontal-to-Vertical Spectral Ratio I Gede Boy Darmawan; Rahmi Mulyasari; Rian Amukti
Jurnal Geofisika Vol 19 No 1 (2021): Jurnal Geofisika
Publisher : Himpunan Ahli Geofisika Indonesia (HAGI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36435/jgf.v19i1.452

Abstract

Makalah ini membahas hasil pengembangan prototip instrumen akselerometer menggunakan sensor ADXL345 yang berbasis Micro-Electrical Mechanical System-based (MEMS). Untuk mengetahui kehandalan instrumen tersebut, kami melakukan validasi dengan cara membandingkan terhadap hasil kerja akselerometer pabrikan REFTEK 130-SMHR dalam pengukuran indeks kerentanan seismik Kg (Nakamura dkk., 2000). MetodeHorizontal-to-Vertical Spectral Ratio (HVSR) digunakan untuk mendapatkan nilai frekuensi dominan fg dan nilai amplifikasi Ag terlebih dahulu dan selanjutnya menghitung nilai Kg. Akuisisi data lapangan menggunakan kedua instrumenakselerometer tersebut dilakukan pada 30 titik amat dengan cuplikan frekuensi 500 Hz dan periode pengukuran selama 30 menit. Hasil pengukuran menunjukkan adanya keselarasan antara akselerometer ADXL345 dengan akselerometer REFTEK 130-SMHR. Untuk total luas daerah studi, kami mendapatkan nilai Kg yang sama, yakni sekitar 57%, dengan perbedaan sedang sekitar 37% dan perbedaan tinggi 6%. Hasil penting lainnya adalah adanya keselarasan pada nilai pengukuran instrumen ADXL345 dengan hasil observasi lapangan, khususnya di Gedung L Fakultas Teknik UNILA. Keselarasan ini dicirikan dengan adanya retakan pada lantai gedung yang berada pada zona kerentanan seismik cukup tinggi. Studi perbandingan kedua instrumen akselerometer tersebut menghasilkan kesimpulan bahwa pengujian prototipe ini masih perlu dilakukan lebih lanjut, khususnya pada daerah dengan tingkat variasi kerentanan seismik yang berbeda
IDENTIFIKASI AKUIFER AIR TANAH DAN EDUKASI KUALITAS AIR BERSIH DI KELURAHAN SUKADANAHAM BANDAR LAMPUNG Rahmi Mulyasari; Ida Bagus Suananda Yogi; Riki Chandra Wijaya
Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Vol 6 No 3 (2022)
Publisher : Lembaga Penelitian dan Pengabdian Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jss.v6i3.406

Abstract

Sukadanaham merupakan daerah bertopografi tinggian dengan pertumbuhan penduduk yang terus meningkat berimplikasi terhadap ketersediaan air di daerah ini. Tujuan dari kegiatan pengabdian ini adalah untuk mengoptimalisasi sumber air tanah dengan teknologi geolistrik sebagai solusi kekurangan air bersih di Kelurahan Sukadanaham. Metode yang digunakan adalah analisis kebutuhan, perancangan, serta pendampingan dan implementasi. Hasil dari kegiatan ditemukan gambaran bawah permukaan dan posisi rekomendasi kedalaman titik pemboran air tanah. Selain itu, peningkatan pemahaman mitra dalam edukasi hidrologi dan kualitas air yang tergambar dari hasil evaluasi dan diskusi yang menunjukkan respon yang positif. Mitra memperoleh solusi dari kegiatan PkM untuk permasalahan kekurangan air bersih.
Kajian Potensi Gua Pandan sebagai Objek Geowisata Lampung Timur Rinda Ermana; Rezky Ariya Dwiguna; Hesti Hesti; Rahmi Mulyasari
Jurnal Riset Fisika Indonesia Vol 3 No 1 (2022): Desember 2022
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v3i1.3639

Abstract

Indonesian tourism has developed in various sectors and regions in Indonesia. Various types of tourism have been presented in modern, traditional and rural forms. One of them is related to the development of geotourism in Indonesia. Geotourism has benefits, namely the welfare of the people who live around it, encouraging local people to participate in maintaining and developing geotourism, realizing sustainable tourism development, giving a distinct impression and experience for every tourist who comes. Pandan Cave is one of the geosites in Giri Mulyo, East Lampung. The Pandan Cave area is included in the Sukadana Lava lithology unit (Qbs). Pandan Cave in geomorphological studies includes structural landforms formed as a result of endogenous processes, in the form of lifting, folding, and faulting. This endogenous force is constructive. Pandan Cave has geotourism potential because of its unique geology, the various rock forms that make up Pandan Cave and its morphology are interesting things for tourists to study geology. In addition, the location of Pandan Cave which is in the plantation of residents close to the village, makes this tourist attraction an interesting place to visit.
GEOLOGICAL INTERPRETATION OF THE OFFSHORE SEDIMENTARY BASIN OF NORTH CENTRAL JAVA BASED ON SPECTRAL ANALYSIS AND 2D GRAVITY MODELING Restu Ningsih; Imam Setiadi; Riza Rahardiawan; Ordas Dewanto; Rahmi Mulyasari
BULLETIN OF THE MARINE GEOLOGY Vol 37, No 2 (2022)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.37.2.2022.788

Abstract

The offshore sedimentary basin of North Central Java is a marine basin located in the northern part of North Serayu Basin. This basin was formed through the uplift of the southern part of Central Java (Bumiayu) caused by the movement of a pair of horizontal faults. Studies of sub-basin delineation and basement configuration are rarely carried out in this basin. Therefore, the gravity method referring to subsurface-density variations was carried out to obtain this information. This research aims to delineate sedimentary basins and interpret the geological subsurface based on gravity data using spectral analysis, highpass and lowpass filters, also 2D gravity modeling. An average estimation depth to the basement in the study area of about 2.22 km was determined using spectral analysis. Qualitative analysis shows the basement-high pattern, sub-basin, and structure lineament patterns. The 2D model shows three layers consisting of the upper sedimentary layer of Tertiary-Neogene and the middle layer of Tertiary-Paleogene sediment with a density value of 2.3 gr/cc and 2.5 gr/cc, respectively. The lower layer has the highest density of 2.67 gr/cc, assumed as a granitic basement. The results of the Second Vertical Derivative (SVD) analysis on the residual anomaly cross-sectional paths indicate the presence of thrust and normal faults which can be used to assist the interpretation of fault structures in subsurface geological models. Gravity analysis of the offshore North Central Java sedimentary basin indicates the occurrence of sub-basins and geological structure patterns that considered as a potential zone for the development of the petroleum system in this area.
The Initiation Study on the Gold Potential Resources at West Coast Area in Lampung Province, Indonesia Akroma Hidayatika; Suharno; Rahmi Mulyasari; Hesti; Idabagus S Yogi; Arif P Prabowo; Syamsurijal Rasimeng
Journal of Engineering and Scientific Research Vol. 4 No. 1 (2022)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (464.216 KB) | DOI: 10.23960/jesr.v4i1.97

Abstract

Gold mineral (Au) is formed due to an increase in the residual solution of magma deposited at high temperature and pressure. This study aims to estimate the potential of gold minerals in the west coast area in Lampung Province. This initiation study was using a geophysical resistivity model. Based on geological data, gold minerals in the West Coast are classified as epithermal hydrothermal deposits in the form of low sulfide quartz veins. The results of the subsurface interpretation were identified as a gold mineralization zone associated with the rock in the form of volcanic rock which has a resistivity value of 400?.m. The source rock volume has been estimated at 130,000 m3 and ?133,000 m3. So that the Au mineral content in the study area is estimated at 0.5-2.09 tons. A future study should be conducted in relation to the development of gold mining industry in Lampung West Coast area, that may integrate more engineering experts.
A Geoelectrical Study of Aquifers in the Natar Region, South Lampung Rahmi Mulyasari; I Gede Boy Darmawan; Hesti Hesti; Akroma Hidayatika; Suharno Suharno
Journal of Engineering and Scientific Research Vol. 4 No. 2 (2022)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v4i2.119

Abstract

The conditions for the development of population growth and development in the area around the City of Bandar Lampung are very fast and starting to get crowded, as happened in the District of Natar South Lampung, especially in the Village of Pemanggilan. This condition causes an increase in the need for clean water resources in line with the increase in groundwater exploitation. Therefore it is necessary to map the potential of groundwater through aquifer mapping and aquifer rock layers through geoelectrical measurements. This study aims to determine the potential of groundwater from volcanic aquifer systems based on geoelectrical measurements. The method used in this study is geoelectric resistivity using the Wenner-Schlumberger configuration with 3 measurement points. The results of the study show that using the geoelectrical resistivity method, layers with a resistivity value of ? 30.3 ?m are interpreted as shallow aquifers at depths varying from 1 to more than 24 meters with lithology suspected to be tuff and tuff sandstones, which according to geological data are included in the Lampung Formation. Using the 2D geoelectric method, the distribution of shallow aquifers in the study area to a depth of 24 meters can also be determined. The data obtained is expected to be used as supporting data for the sustainable use of water sources.
Flood Management Strategy Based on Community Perception in Rajabasa Area, Bandar Lampung City Pranahayu Sekar Winahyu; Az Zahra Putri Sugiarto; Tiara Tabitha; Nandi Haerudin; Rahmi Mulyasari
Journal of Geology and Exploration Vol. 2 No. 1 (2023): Journal of Geology and Exploration, June 2023
Publisher : CV Insight Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58227/jge.v2i1.44

Abstract

A flood is an event that occurs when an excessive volume of water flow submerges land. Bandar Lampung is one area that has the potential for flooding. Floods that occur in the Rajabasa area are caused by disturbances to the balance of nature due to human activities. In this case, this study aims to determine the coping strategy before the flood occurred in the Rajabasa area, to find out the coping strategy when a flood occurs in the Rajabasa area and the last is to find out the disaster management strategy after the flood in the Rajabasa area. The research method used was literature review such as journals and articles about flooding as a source of research carried out by collecting data and information about flooding and survey activities by distributing questionnaires to the public using the Google form as well as short and focused interviews with flood-affected communities. The results of this study indicate that the flood management strategy in the Rajabasa area of Bandar Lampung City, based on the community's point of view, is in the medium category, that is, the community already understands the coping strategy before the flood occurs, during the flood and after the flood occurs.
Optimalisasi Sumber Air Hujan dengan Teknologi Rainwater Harvesting sebagai Solusi Kekurangan Air Bersih di RT 03 Kelurahan Sukadanaham Rahmi Mulyasari; Riki Chandra Wijaya; Ida Bagus Suananda Yogi
Seandanan: Jurnal Pengabdian Pada Masyarakat Vol. 3 No. 1 (2023): Seandanan: Jurnal Pengabdian pada Masyarakat
Publisher : Fakultas Ilmu Sosial dan Ilmu Politik Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/seandanan.v3i1.57

Abstract

Permasalahan kekurangan air bersih yang dihadapi oleh warga di Kelurahan Sukadanaham akibat keterbatasan sumber air yang berasal dari sumur bor perlu mendapatkan perhatian. Tim PkM telah mencarikan solusi untuk mengoptimalisasi sumber air hujan dengan memanfaatkan teknologi rainwater harvesting. Tujuan PkM ini adalah untuk mengoptimalisasi sumber air hujan dan memberikan edukasi pembuatan instalasi sistem pemanenan air hujan yang dilengkapi filter. Kegiatan PkM dilaksanakan pada bulan Juli 2022 dan diikuti oleh perwakilan warga RT.03 Kelurahan Sukadanaham. Hasil dari kegiatan diterapkannya Teknologi Rainwater Harvesting di Mushola Ar-Rahman. Selain itu, peningkatan pemahaman mitra dalam edukasi hidrologi dan kualitas air yang tergambar dari hasil evaluasi dan diskusi yang menunjukkan respon yang positif. Mitra memperoleh solusi dari kegiatan PkM untuk permasalahan kekurangan air bersih.
STUDI PENDAHULUAN POTENSI LIKUEFAKSI MENGGUNAKAN PENDEKATAN GEOLOGI, HIDROGEOLOGI, DAN DATA VS30 PADA KECAMATAN KALIANDA, LAMPUNG SELATAN Restu Wildanu Ahadi; Sultan Al Ghifari; Kevin Bahy Taufiquds; M. Farhan Al Rasyid; M. Aditya Makki; Rahmi Mulyasari
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.27351

Abstract

Likuefaksi merupakan kejadian setelah gempa yang menyebabkan hilangnya kekuatan tanah yang disebabkan tegangan air pori yang timbul akibat beban siklis. Tujuan penelitian ini adalah untuk melakukan studi pendahuluan dan memetakan daerah yang berpotensi terjadi likuefaksi di daerah Kalianda, Lampung. Metode yang digunakan pada penelitian ini didasarkan pada kajian geologi, hidrogeologi dan data Vs30. Litologi pada daerah penelitian merupakan formasi aluvium : bongkah, kerikil, pasir, lanau, lumpur, dan lempung (Qa), dan Endapan gunung api muda : Lava (andesit-basal), breksi, dan tuf (Qhvr), secara umum berupa batuan sedimen urai dan bersifat non-kohesif dengan kondisi air tanah yang cukup jenuh dengan kedalaman rata 2 - 10 meter. Berdasarkan stuktur geologi terdapat sesar aktif dan zona subduksi yang berpotensi menimbulkan gempa bumi. Hasil data Vs30 menunjukkan daerah penelitian memiliki dua klasifikasi tanah, yakni tanah sedang (175 < vs ≤ 350) pada bagian utara dan tanah keras batuan lunak (350 < vs ≤ 750) pada bagian selatan.
PEMANFAATAN SISTEM INFORMASI GEOGRAFIS SEBAGAI LANGKAH STRATEGIS DALAM PEMETAAN ZONA LONGSOR DI KECAMATAN BANJARWANGI Muhammad Reza Fahlefi; Soraya Tiana Dewi; Muhammad Aditya Makki; Nandi Haerudin; Rahmi Mulyasari
GEOGRAPHY : Jurnal Kajian, Penelitian dan Pengembangan Pendidikan Vol 11, No 2 (2023): SEPTEMBER
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/geography.v11i2.15553

Abstract

Abstrak: Kecamatan Banjarwangi merupakan daerah perkebunan, persawahan, dan perbukitan yang curam serta daerah dengan relief yang sedang hingga tinggi. Sehingga daerah ini memiliki potensi terjadinya longsor. Maka dalam hal ini peran kemitigasian sangat penting untuk meminimalisir dampak terjadinya gerakan tanah (longsor). Tujuan penelitian ini yaitu untuk mengidentifikasi potensi bahaya longsor Kecamatan Banjarwangi sebagai langkah strategis dalam memetakan zona bahaya longsor. Metode yang digunakan dalam penelitian ini adalah Sistem Informasi Geografis (SIG) dengan memanfaatkan peta curah hujan, formasi batuan, peta kemiringan lereng, dan peta jenis tanah sebagai bahan analisis bencana longsor. Hasil pada penelitian ini yaitu daerah Banjarwangi memiliki topografi yang curam, intensitas curah hujan yang terbilang tinggi di setiap tahun dengan jenis tanah Ochric Andosols dan Lithosols yang tersusun oleh batuanlempung dan batupasir yang memiliki potensi untuk terjadinya tanah longsor jika dilihat dari struktur dan tekstur batuannya. Tidak tepatnya tata guna lahan dan masyarakat yang tidak tertib aturan menjadi salah satu faktor penyebab longsor. Perlunya sosialisasi dan simulasi bencana agar masyarakat dapat tanggap bencana. Abstract: Banjarwangi District is an area of plantations, rice fields, and steep hills as well as areas with moderate to high relief. So this area has the potential for landslides. So in this case the role of mitigation is very important to minimize the impact of landslides. The purpose of this study is to identify potential landslide hazards in Banjarwangi District as a strategic step in mapping landslide hazard zones. The method used in this study is a Geographic Information System (GIS) by utilizing rainfall maps, rock formations, slope maps, and soil type maps as material for landslide disaster analysis. The results of this study are that the Banjarwangi area has a steep topography, relatively high rainfall intensity every year with Ochric Andosols and Lithosols soil types composed of clay and sandstone which have the potential for landslides when viewed from the structure and texture of the rocks. Inaccurate land use and community regulations that are not orderly are one of the factors causing landslides. The need for socialization and disaster simulation so that people can respond to disasters.
Co-Authors adelia, Elsa Adelyra, Sabrina Akbari, Irgi Akroma Hidayatika Akroma Hidayatika Akroma Hidayatika Aldika Rizkiano Arianto, Khalila Wardah Arif P Prabowo Aviv Irfan Wildan Ghiffary Az Zahra Putri Sugiarto Bagus Sapto Mulyatno Berliana, Calista Rizky Budi Brahmantyo Chairunisa, Aina Wijdan Christas Gracia Dani, Ilham Darmawan, I Gede Boy Dersan Surya Effendi Dewi, Syeikha Puspita Dwi Ratih Purwaningsih Erfani, Sandri Erisa Agustin Fadila, Tiara Andika Fadillah, Muhammad Fatuha, Akmal Alfian Hafiz Ibnu Solihin Hantoro, Andriansyah Surya Hari Wiki Utama Haryan, Nabilah Bintang Herlian, Faiza Attallah Hesti Hesti Hidayatika, Akroma I Gede Boy Darmawan I Gede Boy Darmawan I Gede Boy Darmawan Ida Bagus Suananda Yogi Ida Bagus Suananda Yogi Idabagus S Yogi Imam Setiadi Jeremia Kelvin Sihotang Jesica Nurlaili Juliarka, Bella Restu Karyanto, Karyanto Karyanto, Karyanto Kevin Bahy Taufiquds Kirana Helga Aimee Kuncoro M. Aditya Makki M. Farhan Al Rasyid Mahli, Razki Alfatah Khairu Manullang, Paulina Beny Claudia Matondang, Pebriadi Halomoan Mauliza, Nadia Miftahul Djana Muh Sarkowi Muhammad Aditya Makki Muhammad Naimullah Muhammad Nurul Muhammad Reza Fahlefi Mulyatno, Bagus Sapto Nabilla, Meisha Nanda Hanyfa Maulida Nandi Haerudin Nani Yuniza Noviari, Salsabila Ordas Dewanto Pohan, Muhammad Arif Rizki Pranahayu Sekar Winahyu Puspita, Octa Della Rafi Rilo Pambudi Rambe, Sibgha Alfirdausi Raudhah, Amna Fithri Restu Ningsih Restu Wildanu Ahadi Rezky Ariya Dwiguna Rian Amukti Riduan Riduan Riftyani, Nur Rahma Riki Chandra Wijaya Riki Chandra Wijaya Rinda Ermana Rindiyani, Frans Siska Riza Rahardiawan Rizkiani, Deli Rizkiano, Aldika Saippudin, Muhammad Salfira, Ginanda Shella, Karina Pramay Siagian, Keisha Justina Sianturi, Rizky J. Simanjuntak, Anggun Cahyanti Soraya Tiana Dewi Sugeng Purwo Saputro Sugeng Purwo Saputro Sugeng Purwo Saputro Suharno Suharno Suharno Sultan Al Ghifari Supartoyo Supartoyo Syahrani, Hanna Aulia Syamsurijal Rasimeng Tiara Tabitha Titin Yulianti Trada, Arkaan Faruq Trisya Septiana Unila, Hesti_9201 Voanda, Dinda Fitri Wibowo, Rahmat Catur Winona Putri Prihadita Yadnya, Erlangga Rahardian Yulia Morsa Said