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All Journal Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan JGE (Jurnal Geofisika Eksplorasi) Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Journal of Geoscience, Engineering, Environment, and Technology Journal of Engineering and Scientific Research (JESR) Jurnal Geofisika Yumary: Jurnal Pengabdian kepada Masyarakat Jurnal Riset Fisika Indonesia Jurnal Teknik dan Teknologi Indonesia
Hesti Hesti
Universitas Lampung
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 Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences Other

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APLIKASI METODE GEOLISTRIK RESISTIVITAS UNTUK ANALISIS BIDANG GELINCIR DAN STUDI KARAKTERISTIK LONGSORAN DI JALAN RAYA SUBAN BANDAR LAMPUNG Rahmi Mulyasari; IG Boy Darmawan; Dersan Surya Effendi; Sugeng Purwo Saputro; Hesti Hesti; Akroma Hidayatika; Nandi Haerudin
Jurnal Geofisika Eksplorasi Vol 6, No 1 (2020)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v6i1.61

Abstract

Pidada Urban Village, Panjang District, Bandar Lampung is an area that has medium to high landslide potential. One of landslides prone area triggered by rain located on Jalan Raya Suban. The slip surface areas under water-saturated soil is one of causes of landslides triggered by rain. Geophysical method used to detect slip surface is 2D Resistivity Method of Wenner-Schlumberger Configuration. In this study, an analysis of the slip surface has been carried out with the 2D resistivity method of the Wenner-Schlumberger Configuration and determination characteristic of landslide on Jalan Raya Suban. Based on the results of study indicated that the subsurface lithology consists of layers of tuff sediment, sandy clay and breccia. The slip surface is estimated at the boundary the layers of tuff sediment layer and sandy clay with depth (5-15) meters from the ground surface. The results of analysis and observation showed that type of landslide is translational fine-grained soil. Types of slope reinforcement that can be applied are civil and vegetative techniques.
ANALISIS KARAKTERISTIK LAPISAN SEDIMEN BERDASARKAN DATA MIKROTREMOR DI AREA RUMAH SAKIT PENDIDIKAN UNILA Hesti Hesti; Suharno Suharno; Rahmi Mulyasari; Akroma Hidayatika
Jurnal Geofisika Eksplorasi Vol 7, No 2 (2021)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v7i2.123

Abstract

Provinsi Lampung memiliki kondisi geografis kompleks,  dilewati jalur bukit Bukit barisan Barisan dan terletak diantara dua lempeng yaitu Indo-Australia dan Eurasia. Provinsi Lampung juga  merupakan wilayah yang dekat  dengan Samudera Hindia dan terletak pada zona Sesar Semangko (Sumatra Transform Fault Zone) yang terbentang dari Aceh sampai Teluk Semangka Lampung. Dengan demikian penataan wilayah dan pembangunan infrastruktur yang berbasis mitigasi gempabumi merupakan hal yang sangat penting dilakukan. Tujuan penelitian ini adalah mengetahui karakteristik lapisan batuan sedimen pada area pembangunan Rumah Sakit Pendidikan Universitas Lampung (RSP Unila) sebagai bagian dari tahapan mitigasi bencana gempabumi.  Penelitian ini dilakukan dengan menggunakan metode mikrotremor dan analisis geologi permukaan. Data pengukuran metode mikrotremor dianalisis dengan menggunakan metode analisis Horizontal Vertical Spectrum Ratio (HVSR) untuk mendapakan nilai amplifikasi (A0) dan frekuensi dominan (f0).Hasil dari analisis HVSR diperoleh nilai frekuensi dominan (f0) berkisar 0.65–1.2 Hz, amplifikasi (A0) berkisar 3.33–5.62, dan nilai periode dominan (T0) 0.6–1.5 sekon. Nilai A0, f0, T0 diinterpreasikan dengan mengacu data literatur dan geologi permukaan yang relevan. Hasilnya menunjukkan bahwa daerah penelitian memiliki jenis lapisan sedimen yang rentan terhadap peristiwa gempabumi.
INTERPRETASI GEOFISIKA BIDANG GELINCIR PALEO-ROCKSLIDE PARANGTRITIS Akroma Hidayatika; Suharno Suharno; Rahmi Mulyasari; Hesti Hesti; Bella Restu Juliarka
Jurnal Geofisika Eksplorasi Vol 6, No 2 (2020)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v6i2.75

Abstract

Parangtritis has a rock fall hazard area with a medium to high level of risk. In Parangtritis, there was a large scale paleo-rockslide that involved more than 800 million m3 of rock mass with an area of 1500 m x 2700 m. This is a significant factor in changing the landscape. This research uses 9 Audio-MagnetoTelluric (AMT) primary data points. Using the distance between points 750 m within a 2 km x 2 km study area. The location focused on the western side of the paleo-landslide area in Parangtritis Village. Processing AMT data using the help of MT-INV and RockWorks software. The result of one-dimensional inversion consists of 3 layers. Indicates a low resistivity value (0-10 Ωm) interpreted as beach deposition and sand dune, medium resistivity (50 - 160 Ωm) for Wonosari limestone and high resistivity ( 170 Ωm) for Nglanggran andesite breccias. The average thickness of the first layer is 44 m and the second layer reaches 175 m. Based on the resistivity structure of the AMT data, the interpretation of the boundary contact between the Wonosari limestone and the Nglanggran andesite breccia can act as a slip field in a depth of about 250 m This field is a passive fault field controlled by the Girijati fault in the east of the study area.
Aplikasi Metode Geolistrik dan Analisis X-Ray Diffraction (XRD) untuk Investigasi Longsor di Pidada, Kecamatan Panjang, Bandar Lampung Rahmi Mulyasari; Suharno Suharno; Nandi Haerudin; Hesti Hesti; Ida Bagus Suananda Yogi; Sugeng Purwo Saputro
EKSPLORIUM Vol 42, No 2 (2021): November 2021
Publisher : Pusat Teknologi Bahan Galian Nuklir - BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2021.42.2.6304

Abstract

ABSTRAK. Bandar Lampung merupakan wilayah perkotaan padat penduduk yang terdiri atas daratan dan perairan dengan beberapa dataran tinggi dan pegunungan yang terbentang di wilayah ini. Untuk mendukung pembangunan yang berkelanjutan di sebuah kawasan kota diperlukan konsep penataan wilayah yang mempertimbangkan segala aspek, salah satunya adalah aspek potensi bencana. Salah satu bencana yang berpotensi terjadi di Bandar Lampung, khususnya di Kecamatan Panjang, adalah gerakan massa/longsoran. Berdasarkan penelitian sebelumnya, daerah ini terekam memiliki beberapa titik sejarah longsor tetapi belum ada mitigasi/penanggulangan yang diaplikasikan khusus untuk jenis bencana tersebut. Tujuan dari penelitian ini adalah untuk mengetahui susunan batuan yang berada pada zona rawan longsor Kecamatan Panjang menggunakan metode geolistrik resistivitas serta untuk mengetahui hasil penilaian keteknikan tanah yang diperoleh dari hasil analisis litologi menggunakan X-Ray Diffraction (XRD). Hasil analisis dua lintasan geolistrik mengindikasikan adanya tiga lapisan litologi pada daerah penelitian, yaitu sedimen tuf dengan nilai resistivitas dan kedalaman antara (1–40 Ωm; 0,4–4 m), zona kontak atau bidang gelincir (40–120 Ωm; 2–4 m), dan breksi padu dengan komponen batuan beku (> 120 Ωm; 2–22 m). Selanjutnya berdasarkan hasil analisis penilaian keteknikan tanah, sedimen tuf sebagai lapisan permukaan yang mengalami longsoran diidentifikasi memiliki sifat keteknikan litologi yang rentan karena telah mengalami oksidasi dan pelapukan yang cukup intensif. Data yang diperoleh ini diharapkan dapat dimanfaatkan sebagai data dukung penataan wilayah berbasis potensi bencana.ABSTRACT. Bandar Lampung is a densely populated urban area consisting of land and water with several plateaus and mountains that stretch across this region. To support sustainable development in a city area, it is necessary to have a regional arrangement concept that considers all aspects, one of which is the potential disaster aspect. One of the potential disasters in Bandar Lampung, especially in Panjang District is a mass movement/landslide. Based on previous research, this area has been recorded as having several historical points of landslides, but there is no mitigation/response specifically for this type of disaster. The purpose of this study was to determine the arrangement of rocks that are in the landslide-prone zone in Panjang District using the geoelectric resistivity method and to analyze the soil engineering assessment obtained from the results of lithological analysis using X-Ray Diffraction (XRD). The results of the geoelectric analysis indicate that there are three lithological layers in the study area; namely tuff sediments with resistivity values and depths between (1–40 Ωm; 0.4–4 m), clay sand (40–120 Ωm; 2–4 m), and solid breccias with igneous rock components (>120 Ωm; 2–22 m). Furthermore, based on the results of the analysis of soil engineering assessments, tuff sediment as a surface layer that has experienced landslides has been identified as having susceptible lithological engineering properties because it has undergone quite intensive oxidation and weathering. The data obtained is expected to be used as supporting data for disaster potential-based regional planning.
Pendampingan waste management Koperasi Melati Jaya dalam mendukung kota berkelanjutan Hadi Prayitno; Rahayu Lestari; Dini Hardilla; Hesti Hesti; Angelia Eka Salsabillah; Deno Ratu Alam; Rizal Khairudin
Yumary: Jurnal Pengabdian kepada Masyarakat Vol. 1 No. 3 (2021): Maret
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/yumary.v1i3.218

Abstract

Purpose: This study aimed to increase the knowledge and ability of Koperasi Melati Jaya's waste management. Waste management capabilities can reduce the volume of waste to the landfill. Method: The program began the dissemination of commitment to waste management to contribute to SDGs achievement, assistance in manufacturing verticulture, hydroponics, eco-bricks, garden architects, and utilizing waste. Evaluation was carried out to improve the waste management program. Results: Through this program, more than 70% of the cooperative's members manage waste using the 7R principle. Knowledge, attitudes, and abilities in recycling waste into hydroponics, verticulture, and eco-bricks have increased. The conversion of waste into valuable products indirectly contributes to reducing the volume of waste from TPA Bakung. The income of cooperative members and the fact that fresh vegetables in the city of Bandar Lampung have increased. Conclusions: The consistency program can bring Sukamenanti Baru close to zero waste so that it becomes a livable village. Indirectly, it supports the achievement of SDGs in Bandar Lampung City. Keywords: Garbage, Women, Cooperatives, SDGs
Interpretation of Dynamic Sediment Characteristic Based on Microtremor Analysis in Prambanan Region, Sleman Yogyakarta and Klaten Central Java, Indonesia Hesti Hesti; Subagyo Pramumijoyo; Djoko Wintolo
Jurnal Geofisika Vol 16 No 1 (2018): Jurnal Geofisika
Publisher : Himpunan Ahli Geofisika Indonesia (HAGI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2054.212 KB) | DOI: 10.36435/jgf.v16i1.24

Abstract

Yogyakarta earthquake on Mei 27, 2006 caused Prambanan area get quite severe damage marked by damageof resident house and Prambanan Temple.This study was conducted using data of microtremorsingle station and Yogyakarta earthquake 27 May 2006. Data were analyzed with microtremor HVSR methods to get the value of the dominant frequency (fo) and amplication (Ao).Furthermore, calculated the value of peak ground acceleration (PGA) in the layers of sedimen bedrock and seismic vulnerability index (Kg) to get ground shear strain value. Prambanan area has a dominant frequency (fo) value ranges from 0.63-6.78 Hz. Ground shear strain valueranges from 3,55.10-5 - 4,04.10-2.Each of these factors is then mapped with a division of 4 zones is very high, high, medium, and low.Based on the analysis of all these factors Prambanan area is an area that is vulnerable to the risk of earthquake events.
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.
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.
PENDIDIKAN MITIGASI BENCANA GEMPA BUMI DI YAYASAN DARUL HIKMAH LAMPUNG Hesti Hesti
Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Vol 7 No 1 (2023)
Publisher : Lembaga Penelitian dan Pengabdian Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jss.v7i1.410

Abstract

Potensi bencana gempabumi di Provinsi Lampung termasuk 10 besar di Indonesia, sehingga perlu dilakukan upaya mitigasi dari berbagai aspek. Salah satu aspek yang sangat penting adalah memberikan pendidikan mitigasi terhadap siswa-siswa di sekolah. Pendidikan mitigasi sangat penting ditanamkan kepada masyarakat sedini mungkin agar memberikan kemudahan dalam proses evakuasi ketika terjadi bencana gempabumi. Yayasan Darul Hikmah Lampung terletak di Kota Bandar Lampung Kecamatan Rajabasa. Yayasan ini memiliki beberapa cabang dengan jumlah siswa dan siswi yang sangat banyak dari jenjang sekolah dasar hingga sekolah menengah atas. Kegiatan pengabdian ini bertujuan untuk (1) Mengenalkan wawasn tentang bencana alam sedini mungkin (2) membekali siswa mengenai pengetahuaan tentang potensi bencana gempabumi dan mitigasi gempabumi, Kegiatan pengabdian ini telah dilaksanakan sesuai dengan perencanaan dan telah berhasil dengan jumlah peserta yang melebihi target awal. Ketercapaian target materi yang telah direalisasikan adalah 85%, dan kemampuan peserta dalam penguasaan materi mencapai 80%, serta kepuasan peserta pelatihan mencapai 75 %. Kata kunci: bencana, gempabumi, mitigasi, yayasan darul hikmah lampung
Co-Authors Achmad, Rahim Akroma Hidayatika Akroma Hidayatika Amelia, Risky Nuri Angelia Eka Salsabillah Arif P Prabowo Aswan, Marwis Darmawan, I Gede Boy Deno Ratu Alam Dersan Surya Effendi Dini Hardilla Djoko Wintolo Hadi Prayitno I Gede Boy Darmawan Ida Bagus Suananda Yogi Idabagus S Yogi Juliarka, Bella Restu Muhamad Firdaus Al Hakim Nanda Hanyfa Maulida Nandi Haerudin Rahayu Lestari Rahmi Mulyasari Ramdani Salam Rezky Ariya Dwiguna Rinda Ermana Rizal Khairudin Rizkiano, Aldika Rohima Wahyu Ningrum, Rohima Wahyu Subagyo Pramumijoyo Sugeng Purwo Saputro Sugeng Purwo Saputro Suharno Suharno Suharno Suryanto, Wiwit Syamsurijal Rasimeng Taib, Suryani Wahidin, Nurhalis