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ANALISIS ZONA RAWAN GEMPA BUMI DI KABUPATEN BENGKULU SELATAN BERDASARKAN PERCEPATAN TANAH PUNCAK MENGGUNAKAN FORMULA KANAI Giltro Kencoro; M Farid; Arif Ismul Hadi; Darmawan Ikhlas Fadli; Agung Sedayu
Jurnal Kumparan Fisika Vol. 6 No. 2: Agustus 2023
Publisher : Unib Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/jkf.6.2.75-82

Abstract

ABSTRAK   Provinsi Bengkulu terletak di antara Sumatra Fault Zone  dan Mentawai Fault Zone, yang mana merupakan sistem patahan paling berbahaya di Pulau Sumatera, Indonesia. Selain itu, gempa bumi Bengkulu tahun 2000 dengan magnitudo sebesar Mw 7,9 menyebabkan banyak korban jiwa dan harta benda di sekitar wilayah studi, dan banyak gempa lain yang merusak yang terjadi setelah gempa ini. Penentuan zona rawan gempa Kabupaten Bengkulu Selatan penting dilakukan untuk mengurangi kerusakan akibat gempa. Oleh karena itu, perekaman data mikrotremor short period dilakukan di 65 titik di daerah penelitian. Analisis data ambient noise dapat membantu mengidentifikasi local site-efect di Kabupaten Bengkulu Selatan dengan menggunakan metode Horizontal to Vertical Spectral Ratio (HVSR). Frekuensi fundamental alami berkisar antara 1.0 Hz hingga 9.3 ​​Hz, dan faktor amplifikasi berkisar antara 1.8 hingga 4.4. Nilai PGA diperoleh dari kejadian gempa bumi selama 100 tahun dan dihitung menggunakan persamaan Kanai. Hasil menunjukkan bahwa nilai PGA berkisar antara 0.18 g hingga 0.78 g. Zona rawan gempa di Kabupaten Bengkulu Selatan terbagi menjadi tiga zona, yaitu zona klasifikasi rendah (Kota Manna, Pasar Manna, Bunga mas, dan Seginim) , sedang (Pino Raya, Air Nipis, dan Ulu Manna), dan tinggi (Manna, Kedurang, dan Kedurang Ilir). Hasil penelitian ini dapat menjadi rekomendasi bagi pemangku kepentingan untuk mempertimbangkan langkah-langkah yang tepat untuk desain dan konstruksi tahan gempa di Kabupaten Bengkulu Selatan.   Kata  kunci: Gempa Bumi, HVSR, Kabupaten Bengkulu Selatan, PGA.   ABSTRACT   Bengkulu Province is between the Sumatra Fault Zone and the Mentawai Fault Zone, the most dangerous fault system in Sumatra, Indonesia. In addition, the 2000 Bengkulu earthquake with a magnitude of Mw 7.9 caused a significant loss of life and property in the study area, and many other destructive earthquakes occurred after this earthquake. Determining the earthquake-prone zone of South Bengkulu Regency is essential to reducing earthquake damage. Therefore, short-period microtremor data recording was conducted at 65 points in the study area. Analysis of ambient noise data can help identify local site effects in South Bengkulu Regency using the Horizontal to Vertical Spectral Ratio (HVSR) method. The natural fundamental frequency ranges from 1.0 Hz to 9.3 Hz, and the amplification factor ranges from 1.8 to 4.4. PGA values were obtained from a 100-year earthquake event and calculated using the Kanai equation. The results show that PGA values range from 0.18 g to 0.78 g. The earthquake-prone zones in South Bengkulu Regency are divided into three zones: low (Kota Manna, Pasar Manna, Bunga Mas, and Seginim), medium (Pino Raya, Air Nipis, and Ulu Manna), and high (Manna, Kedurang, and Kedurang Ilir). The results of this study can serve as recommendations for stakeholders to consider appropriate measures for earthquake-resistant design and construction in South Bengkulu Regency.   Keywords: Earthquake, HVSR, South Bengkulu Regency, PGA.
Application of Reverse Osmosis Membrane Technology in Trans Malakoni Village, Enggano Island Ashar Muda Lubis; Fachruzzaman Fachruzzaman; Rini Indriani; Sipriyadi Sipriyadi; Darmawan Ikhlas Fadli
ABDI: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 7 No 3 (2025): Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Labor Jurusan Sosiologi, Fakultas Ilmu Sosial, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/abdi.v7i3.1189

Abstract

Trans Malakoni Village, located on Enggano Island, Bengkulu Province, faces significant challenges in providing access to clean, potable water. Limited access to adequate freshwater sources and water quality that frequently fails to meet health standards are major obstacles to the community's sustainable livelihood. This research aims to explore the potential and implementation of household-scale reverse osmosis (RO) technology as an innovative solution for producing clean, potable water in Trans Malakoni Village. The research methodology involves raw water quality analysis, the design of a household-scale RO system suitable for local conditions, and an evaluation of system performance and community acceptance. Initial results indicate that existing water sources in Trans Malakoni Village, although limited, can be effectively treated using RO technology to achieve established drinking water quality standards. The proposed household-scale RO system design emphasizes energy efficiency, operational ease, and affordable maintenance costs, thereby enabling sustainable adoption by households. The implementation of RO technology is expected not only to enhance access to clean water but also to contribute to improved public health, self-reliance in water resource management, and sustainable living in Malakoni Village. This study recommends further research on system optimization and community education programs to maximize the positive impact of RO technology in other remote island regions.