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All Journal BULETIN OSEANOGRAFI MARINA POSITRON Geoplanning : Journal of Geomatics and Planning IJOG : Indonesian Journal on Geoscience GRADIEN Journal of Engineering and Technological Sciences Jurnal Geosaintek Jurnal Kelautan Tropis JOURNAL ONLINE OF PHYSICS Jurnal Fisika FLUX JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) MAJALAH ILMIAH GLOBE Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Geosains dan Teknologi Jurnal Kelautan Nasional JURNAL METEOROLOGI DAN GEOFISIKA Indonesian Review of Physics (IRiP) Journal of Community Empowerment for Health Jurnal Instrumentasi Makara Journal of Technology Indonesian Journal of Community Empowerment and Service Jurnal Pengabdian Pada Masyarakat Jurnal Meteorologi dan Geofisika Jurnal Geosaintek
Ashar Muda Lubis
Jurusan Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Bengkulu
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Analisis Kejadian Banjir ROB di Provinsi Bengkulu Periode 2022-2024 Agustina, Lisa Asyifa; Lubis, Ashar Muda; Pranowo, Widodo Setiyo
Jurnal Kelautan Tropis Vol 28, No 1 (2025): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v28i1.25833

Abstract

Bengkulu Province is one of the coastal areas prone to tidal flooding due to a combination of various oceanographic and meteorological factors such as tides, wind speed, rainfall, and sea wave height. This study aims to analyze the dominant factors causing tidal floods in Bengkulu Province during the period 2022-2024. Data on tidal flood events were obtained from BPBD and BPS reports of Bengkulu Province, as well as mass media sources. The analysis was conducted using wind data from the European Center for Medium Weather Forecast (ECMWF), rainfall data from the Meteorology, Climatology and Geophysics Agency (BMKG), and tidal prediction data from the Geospatial Information Agency (BIG). The results show that during the west season, tidal floods are triggered by strong westerly winds due to the West Monsoon, full tides, and moderate to high rainfall, as in the events of February 4-6, 2022 and January 26-27, 2023. During the east monsoon, tidal floods are caused by steady southeast winds and high tides due to the East Monsoon, despite low rainfall, as in the events of July 30, 2023 and August 3-5, 2023. In the transitional season, tidal floods tend to be influenced by a combination of full tides, moderate winds and light to moderate rainfall, such as on May 14-15, 2022 and October 16-17, 2024. Factors such as tropical cyclone activity and the Indian Ocean Dipole (IOD) also contribute significantly to the increased risk of tidal flooding, particularly strengthening winds and increasing rainfall in certain seasons.  Provinsi Bengkulu merupakan salah satu wilayah pesisir yang rawan terkena banjir rob akibat kombinasi berbagai faktor oseanografis dan meteorologis seperti pasang surut, kecepatan angin, curah hujan, dan tinggi gelombang laut. Penelitian ini bertujuan untuk menganalisis faktor dominan penyebab banjir rob di Provinsi Bengkulu selama periode 2022–2024. Data kejadian banjir rob diperoleh dari laporan BPBD dan BPS Provinsi Bengkulu, serta sumber media massa. Analisis dilakukan dengan menggunakan data angin dari European Center for Medium Weather Forecast (ECMWF), data curah hujan dari Badan Meteorologi, Klimatologi, dan Geofisika (BMKG), serta data prediksi pasang surut dari Badan Informasi Geospasial (BIG). Hasil penelitian menunjukkan bahwa pada musim barat, banjir rob dipicu oleh angin barat yang kuat akibat Monsun Barat, pasang purnama, dan curah hujan sedang hingga tinggi, seperti pada kejadian 4–6 Februari 2022 dan 26–27 Januari 2023. Selama musim timur, banjir rob disebabkan oleh angin tenggara yang stabil dan gelombang tinggi akibat Monsun Timur, meskipun curah hujan rendah, seperti pada kejadian 30 Juli 2023 dan 3–5 Agustus 2023. Pada musim peralihan, banjir rob cenderung dipengaruhi oleh kombinasi pasang purnama, angin sedang, dan curah hujan ringan hingga sedang, seperti pada 14–15 Mei 2022 dan 16–17 Oktober 2024. Faktor-faktor seperti aktivitas tropikal siklon dan Indian Ocean Dipole (IOD) juga memberikan kontribusi signifikan terhadap peningkatan risiko banjir rob, terutama memperkuat angin dan meningkatkan curah hujan pada musim tertentu.
Penerapan Metode Geolistrik Tahanan Jenis Sebagai Upaya Mengatasi Kekeringan Di Areal Persawahan Sebagai Solusi Untuk Menentukan Posisi Dan Kedalaman Akuifer Di Desa Sumber Makmur Kecamatan Sukaraja Seluma Suhendra; Halauddin; Lidiawati, Liza; Lubis, Ashar Muda
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 4 No. 2 (2024): December 2024
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/icomes.v4i2.39862

Abstract

Kegiatan pengabdian kepada masyarakat di Desa Suka Makmur, Kecamatan Sukaraja, Kabupaten Seluma, Provinsi Bengkulu, mengungkap keberadaan lapisan akuifer yang potensial. Akuifer di desa ini terletak pada kedalaman relatif dangkal karena berada di dataran rendah dekat pesisir. Pembuatan sumur bor dapat dilakukan pada titik antara 240 m hingga 480 m dari titik awal pengukuran dengan kedalaman sekitar 75 m. Tujuan dilaksanakan dan dipilihnya des aini karena sawah tadah hujan yang terdapat di desa ini cukup luas dan merupakan salah satu desa yang menjadi lumbung pertanian utamanya persawahan. Pada saat terjadi kemarau Panjang biasanya areal sawah yang terdapat di des aini sering gagal panen dikarenakan kekurangan akan air yang berasal dari air hujan. Untuk mengatasi hal tersebut khususnya permasalahan akan air untuk mengairi sawah tadah hujan tersebut maka akan diupayakan dengan cara membuat sumur bor yang nantinya berfungsi untuk dapat mengairi areal persawahan terutama pada saat kemarau. Struktur bawah permukaan menunjukkan adanya tanah gambut hingga kedalaman 2 - 2,5 m. Kehadiran lahan gambut ini menyebabkan air tidak tersimpan optimal di lapisan top soil selama musim kemarau, yang berdampak pada gagal panen padi dan tanaman lainnya. Ini menjadi salah satu faktor penting yang perlu diperhatikan untuk mendukung keberlanjutan pertanian di desa tersebut.
Hubungan ENSO-IOD terhadap Curah Hujan dan Suhu Permukaan Laut di Perairan Bengkulu Maharani, Surfiarti; Ratnawati, Herlina Ika; Lubis, Ashar Muda
Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v14i2.69693

Abstract

Perairan Bengkulu terletak di sebelah barat Perairan Indonesia, berhadapan langsung dengan Samudera Hindia yang memengaruhi dinamika atmosfer-laut di wilayah tersebut. Penelitian ini bertujuan untuk mengetahui hubungan El Niño Southern Oscillation (ENSO) dan Indian Ocean Dipole (IOD) terhadap curah hujan dan Suhu Permukaan Laut (SPL). Data yang digunakan adalah data klimatologi (1993-2023) yang telah dikomposit dan dilakukan analisa korelasi. Hasil komposit SPL menunjukkan bahwa suhu tertinggi terjadi pada Maret–Mei (29°C-31°C), sedangkan suhu terendah pada Agustus–November (26°C-27°C). Curah hujan memiliki pola bimodial pada Maret dan Oktober/November. Hasil analisis korelasi mengindikasikan bahwa ENSO lebih memengaruhi SPL daripada curah hujan sedangkan IOD lebih dominan dalam SPL dan curah hujan. Fenomena El Niño dan IOD positif berdampak pada kurangnya curah hujan dan memperpanjang musim kemarau, sementara La Niña dan IOD negatif berdampak pada peningkatan curah hujan serta memperpanjang musim hujan. Hubungan El Niño dan La Niña diwakili oleh Oceanic Niño Index (ONI) terhadap curah hujan yang terjadi pada bulan September-Oktober-November (SON) dengan nilai korelasi -0.31 hingga -0.42. Sedangkan hubungan Dipole Mode Index (DMI) terhadap SPL pada periode SON menunjukkan nilai korelasi -0.70 hingga -0.78 dimana korelasi tertinggi pada Oktober (-0.78). Penelitian ini menegaskan bahwa ENSO-IOD berperan penting dalam pola iklim di Perairan Bengkulu. Bengkulu Waters are located in the western part of Indonesian Waters, directly facing the Indian Ocean, affecting the region's atmosphere-sea dynamics. This research aims to determine the relationship of ENSO and IOD to rainfall and SST. The data used are climatological (1993-2023) composited and correlation analysis is carried out. The SPL composite results show that the highest temperature occurs in March-May (29°C-31°C), while the lowest temperature is in August-November (26°C-27°C). Rainfall has a bimodial pattern in March and October/November. Correlation analysis results indicate that ENSO influences SST more than rainfall, while IOD is more dominant in SST and rainfall. Positive El Niño and IOD phenomena result in less rainfall and extended dry seasons, while negative La Niña and IOD result in increased rainfall and extended wet seasons. The ONI represents the El Niño and La Niña relationship to rainfall occurring in September-October-November (SON) with a correlation value of -0.31 to -0.42. Meanwhile, the DMI relationship to SST in the SON period shows a correlation value of -0.70 to -0.78, with the highest correlation in October (-0.78). This research confirms that ENSO-IOD plays an important role in climate patterns in Bengkulu Waters.
ESTIMASI DEFORMASI INTERSEISMIC DI DAERAH PANTAI BENGKULU BAGIAN SELATAN DENGAN MENGGUNAKAN METODE SURVEY GPS GEODETIK Lubis, Ashar Muda; Wahyu, Mia; Sahputra, Rio; Samdara, Rida
Jurnal Geosaintek Vol. 7 No. 2 (2021)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Telah dilakukan pengamatan deformasi pada kawasan pesisir pantai dalam siklus interseismic dengan menggunakan Global Positioning System (GPS) pada lima titik pemantauan di wilayah Bengkulu bagian selatan. Pengamatan GPS dilakukan dalam kurun waktu 2019-2020 kecuali untuk stasiun DEYU pada kurun waktu 2014-2016. Pengolatan data GPS dilakukan dengan menggunakan software GAMIT/GLOBK. Hasil pengolahan berupa posisi harian GPS time series dalam komponen utara dan timur yang kemudian dilakukan linear fit untuk mendapatkan vektor pergeseran. Kecepatan pergerakan pada stasiun GPS berada 22,23-27,67 mm/tahun dengan error pengukuran < 2,5 mm/tahun. Dari hasil penelitian ini menunjukkan adanya aktivitas deformasi interseismic di wilayah pesisir Bengkulu bagian selatan dengan arah vektor pergeseran hasil pengamatan menuju ke arah timur laut. Vektor pergerakan interseismic yang teramati masih perlu dikoreksi terhadap rotasi Blok Sunda, sehingga vektor pergerakan interseismic yang diperoleh hanya berasal dari pergerakan zona subduksi Sumatera dan sesar Sumatra yang berguna sebagai input pada pemodelan potensi kegempaan di Sumatra khususnya di daerah Bengkulu.
An Analysis of Coal Seam Lithology using The Well-logging Method for Correlation of Location X, Musi Banyuasin Coalfields, South Sumatra Lubis, Ashar Muda; Larang, Miranda Puspa; Fahmi, Khairul; Shah, Afroz Ahmad
Indonesian Journal on Geoscience Vol. 11 No. 2 (2024)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.11.2.221-229

Abstract

South Sumatra region has abundant potential coal reserves, but the lack of structural and stratigraphic data makes it not be easy to map their total extent and to understand the genesis. These limitations can be partially resolved using the borehole well-logging methods. The aim of this research was to investigate correlation of coal seam lithology using the well-logging methods in a coalfield, location X, Musi Banyuasin, South Sumatra. The several exploration activities were conducted using the well-logging method to acquire gamma-ray logs and density logs data from seven boreholes, namely PMCBS12, PMCBS13, PMCBS14, PMCBS15, PMCBS16, PMCBS17, and PMCBS19 sites. WellCAD software was used during the data processing to derive logging data (gamma-ray and density logs), and Minex software was utilized to analyze the physical parameter correlation among boreholes. Borehole data analysis was carried out by analyzing the lithology contained in the borehole, especially to analyze the characteristics of the coal seam, such as depth and thickness. The results suggest that the thickness of the existing coal seam in area X is at seam 6 from a depth of about 2.95-19.95 m, with a coal seam thickness ranging from 1.85 m in the PMCBS12 to a thickness of 3.6 m in the PMCBS19 well. Two to three - vertically spread seams were found in each borehole with a thickness of about 0.35-3.6 m at various depths. Correlation results among boreholes show that the distribution of coal seams extends from the northwest to the southeast with a distribution direction of N300˚E/6˚.
Nurturing Natural Beauty: Empowering MAN 1 Model Bengkulu's Female Students with Red Dragon Fruit (Hylocereus polyrhizus) Cosmetics Crafting Workshop Masrijal, Camelia Dwi Putri; Taurina, Hilda; Lubis, Ashar Muda; Permasari, Rose Intan; Hermansyah, Oky; Slamet, Samwilson; Rahmawati, Suci; Rahmadhani, Aliyah; Monalisa, Shelyn Puteri; Wahid, Muhammad Ali Ashar
Journal of Community Empowerment for Health Vol 7, No 1 (2024)
Publisher : Faculty of Medicine, Public Health, and Nursing, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcoemph.90334

Abstract

Introduction: The use of lipstick, blush-on, and various colored cosmetic products is highly popular among teenage girls. However, the adverse effects of hazardous colorants in cosmetics include respiratory irritations, skin irritations, eye injuries, gastrointestinal toxicity, and carcinogenic properties. Red Dragon Fruit contains a significant amount of red anthocyanin antioxidants, making it a viable natural colorant for food, cosmetics, and textiles. This community engagement project aimed to enhance the understanding of teenage girls, especially students of MAN 1 Model City of Bengkulu, regarding illegal cosmetics containing harmful and prohibited ingredients. It also aimed to improve the girls' skills in crafting natural Lip Tint and Blush-On preparations from Red Dragon Fruit (Hylocereus Polyrhizus), promoting a return to nature in cosmetic choices. This initiative was expected to inspire creative ideas among teenagers for designing alternative economic activities centered on producing natural and halal cosmetics made from herbal ingredients. Methods: The project involved educational and awareness-raising activities about the dangers of forbidden cosmetic ingredients, followed by workshops on making Lip Tint and Blush-On formulations. These workshops were led by faculty members from the School of Medicine and the School of Pharmacy, with assistance from students of the Faculty of Mathematics and Natural Sciences at the University of Bengkulu. Results: Evaluation results showed that workshop participants experienced a 63.2% increased in knowledge and gained the ability to independently create Lip Tint and Blush-On products from red dragon fruit. Conclusion: The workshop successfully produced natural Lip Tint and Blush On and the project also heightened the students' interest in the Pharmacy Program.
Co-Authors : Samwilson Slamet, : Samwilson Abrar, Camelia Batun Afrizal B. Agam Wardani Agustina, Lisa Asyifa Akbar, Arya J Amalia, Isra Angga Putra, Angga Angga Saputra Arif Ismul Hadi Arya J Akbar Arya J Akbar Atmaja, Vestidhia Yunisya Bastian, Muhammad Chandra Devika Christina Butarbutar Edi Kusmanto Edi Kusmanto Edi Purwanto Fadli, Darmawan Ikhlas Halauddin Halauddin Halauddin Harlianto, Budi Herlina Ika Ratnawati, Herlina Ika Juhendi Sinaga Juhendi Sinaga Juhendi Sinaga Juhendi Sinaga Kamilah, Santi Nurul Khairul Fahmi Larang, Miranda Puspa Lestari, Dian Fita Lina Handayani Lizalidiawati Lizalidiawati M Hasanudin M. Hasanudin M. Hasanudin Maharani, Surfiarti Masrijal, Camelia Dwi Putri Mawaddah Mawaddah Mia Wahyu Monalisa, Shelyn Puteri Muttaqin Muttaqin Nanda Sari Nia Veronica Oky Hermansyah Permasari, Rose Intan Rahmadhani, Aliyah Rani Lestari Rendi Hanapi Rida Samdara Rida Samdara Rida Samdara Rida Samdara Rida Samdara Rida, Samdara - Rio Sahputra Rio Saputra Rio Saputra Rio Saputra Rio Saputra Sahputra, Rio Satriani, Bella Shah, Afroz Ahmad Sipriyadi Sri Yudawati Cahyarini Suci Rahmawati, Suci Suhendra Suhendra Suhendra Suhendra Suhendra Suhendra Suhendra Sumanjaya, Erlan - Supiyati . Taurina, Hilda Utama, Ahmat Fakhri Wahid, Muhammad Ali Ashar Wahyu, Mia Widodo S Pranowo Wulandari, Gustina Dwi Yosi Apriani Putri Zainal Abidin