Article Per Year (5 Year)
p-Index From 2021 - 2026
2.487
P-Index
This Author published in this journals
All Journal Jurnal Sains dan Teknologi Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Jurnal Fisika Unand Jurnal Kelautan Tropis Jurnal Fisika FLUX JURNAL ENGGANO JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Spektra: Jurnal Fisika dan Aplikasinya Jurnal Pendidikan Fisika dan Teknologi Silampari Jurnal Pendidikan Ilmu Fisika Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Maritime Park: Journal Of Maritime Technology and Socienty Indonesian Journal of Community Empowerment and Service
Johan, Septi
Unknown Affiliation
Aerospace Engineering Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

Published : 17 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 17 Documents
Search

 1   2 
The Influence of Wind Dynamics and Longshore Currents on Shoreline Changes in the Lais Segment, North Bengkulu, Based on Seasonal Variations Supiyati; Ekawita, Riska; Johan, Septi; Dari, Evita Sri Wulan
JST (Jurnal Sains dan Teknologi) Vol. 14 No. 2 (2025): July
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jst-undiksha.v14i2.95817

Abstract

Pantai Lais mengalami perubahan garis pantai yang sangat cepat yang disebabkan abrasi dan sedimentasi. Penelitian ini bertujuan untuk mengidentifikasi karakteristik dinamika angin dan  Longshore  Current, dan pemetaan perubahan garis pantai di segmen Pantai Lais.  Penelitian ini merupakan penelitian kuantitatif-deskriptif. Subjek penelitian mencakup data oseanografi seperti kecepatan dan arah Longshore  Current, kecepatan angin, serta tinggi dan periode gelombang laut yang diperoleh melalui pengukuran langsung di lima titik pengamatan pada dua musim peralihan. Data yang sudah diperoleh kemudian dianalisis secara deskriptif dan kuantitatif. Temuan penelitian menunjukan perubahan garis pantai di segmen Lais sangat dipengaruhi oleh dinamika angin dan Longshore  Current, dimana angin adalah faktor utama pembangkit gelombang. Ketinggian gelombang laut akan menimbulkan gelombang pecah yang merupakan penyebab terbentuknya Longshore  Current. Ketinggian gelombang laut dan kuatnya energi gelombang menghantam dinding pantai, mengakibatkan pinggir pantai terabrasi. Material terabrasi ini akan ikut terbawa oleh Longshore  Current   sesuai dengan arah gerak arus mengalir, yang kemudian akan menumpuk di daerah yang kecepatan aliran arus lemah atau mengecil, sehingga terjadi sedimentasi. Rata-rata sedimentasi selama 10 tahun terakhir sebesar 10,60 meter/tahun, dengan sedimentasi tertinggi terjadi tahun 2017 sebesar 29,05. Sedangkan rata-rata abrasi selama 10 tahun terakhir 13,03 meter/tahun, dengan abrasi tertinggi tahun 2015 sebesar 20,5 m. Penelitian ini berimplikasi dalam perencanaan zona pesisir, terutama dalam mitigasi erosi pesisir, perencanaan ruang pesisir, dan perlindungan pemukiman serta infrastruktur yang rentan terhadap abrasi.
PELATIHAN PENGEMBANGAN BAHAN AJAR BERBASIS DIGITAL MENGGUNAKAN CANVA BAGI GURU-GURU SDIT NURUL FIKRI KOTA BENGKULU XXX, SATURN; Johan, Septi; Supiyati, Supiyati; Kurniawan, Chandra; Johan, Henny
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 5 No. 2 (2025): December 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/icomes.v5i2.43508

Abstract

Kegiatan pembelajaran daring menuntut guru untuk melakukan berbagai penyesuaian, baik metode maupun media pembelajaran, agar materi dapat tersampaikan dengan efektif kepada peserta didik tanpa memberatkan mereka. Salah satu alternatif media yang dapat digunakan adalah bahan ajar digital berbasis e-modul. Kegiatan pengabdian kepada masyarakat (PPM) ini bertujuan untuk meningkatkan kompetensi guru dalam mengembangkan bahan ajar digital menggunakan aplikasi Canva. Metode pelaksanaan kegiatan terdiri atas tahap persiapan, pelaksanaan pelatihan, dan evaluasi. Tahap persiapan meliputi perizinan, koordinasi dengan mitra, serta penyiapan alat, bahan, soal pre-test dan post-test, serta materi pelatihan. Koordinasi awal dilakukan bersama Kepala Sekolah SDIT Nurul Fikri Kota Bengkulu untuk menyusun jadwal dan teknis pelaksanaan kegiatan. Tahap selanjutnya adalah pelaksanaan kegiatan, sosialisasi diawali dengan pre-test untuk mengukur pengetahuan awal peserta tentang Canva, dilanjutkan dengan sosialisasi dan pelatihan pembuatan bahan ajar digital menggunakan Canva, serta diakhiri post-test untuk mengevaluasi hasil pelatihan. Berdasarkan hasil post-test, seluruh peserta telah mencoba membuat bahan ajar digital dan mengenal fitur-fitur Canva. Hasil pre-test dan post-test menunjukkan adanya peningkatan pemahaman peserta sebesar 95% setelah mengikuti kegiatan ini. Kegiatan ini diharapkan dapat menjadi solusi efektif bagi guru dalam menghadapi tantangan pembelajaran daring yang menarik dan inovatif.
Training on the Utilization of the HVSR Geophysical Method Based on the Concept of Mechanical Wave Propagation for Earthquake Hazard Potential Analysis in Kuto Rejo Village Hadi, Arif Ismul; Refrizon; Muda Lubis, Ashar; Johan, Septi; Halauddin
Indonesian Journal of Community Empowerment and Service (ICOMES) Vol. 5 No. 2 (2025): December 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/icomes.v5i2.45281

Abstract

Kepahiang Regency has a high potential for earthquake hazards. This is because the Kepahiang area is located in the subduction zone of the Indo-Australian tectonic plate movement in the ocean and the movement of the Musi segment of the Sumatra fault on land as the main fault. As an area with high earthquake hazard potential and its location near the Musi segment fault, efforts are needed to reduce the risk of disasters due to earthquakes through the activity "Training on the Utilization of the Horizontal to Vertical Spectral Ratio (HVSR) Geophysical Method”. The HVSR method is a geophysical method based on the concept of mechanical wave propagation. HVSR measurements can be used to understand the structural properties of subsurface. The target audience for this activity is Village Apparatus and Residents of Kuto Rejo Village, Kepahiang Regency. This activity aims to provide an understanding of the basic concepts of mechanical wave propagation in rocks and provide training in the use of the HVSR method. The method used is through the stages of focus group discussion (FGD), field data acquisition, processing, interpretation and evaluation. The indicator of the achievement of the objectives of this activity is if each activity participant can acquisition, process, analyze, and interpret and answer the questionnaire related to the community service material correctly. The results of this activity provide insight into the importance of local wisdom-based earthquake hazard mitigation for disaster risk reduction. Village Apparatus and Residents of Kuto Rejo Village will continuously share their knowledge with other villagers from this activity.
Variabilitas Suhu di Samudera India Pada Saat Indian Ocean Dipole Positif Tahun 2006 Johan, Septi
JURNAL ENGGANO Vol. 10 No. 1 (2025)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jenggano.10.1.20-27

Abstract

The Indian Ocean Dipole (IOD) is a phenomenon of ocean and atmosphere interaction characterized by differences in sea surface temperature between the eastern (90oE-110oE and 10oS-0oN) and western (50oE-70oE and 10oS-10oN) of Indian Ocean. This study examines the variability of the temperature of the Indian Ocean during the positive evolution of the Indian Ocean Dipole (IOD) in 2006. The data used in this research are Sea Surface Temperature (SST) data, wind data, monthly Sea Surface Height (SSH) data and current velocity data. zonal. These data were then analyzed using a low-pass filter with a 13-month cut-off period to observe the IOD phenomenon. The results of this study indicate that positive IOD evolution in 2006 was identified through the IOD Index, this is also supported by the results of temperature data analysis. Based on temperature data, there is a pattern of temperature differences between the eastern and western regions of the Indian Ocean. In May, the surface temperature begins to decrease, indicating the start of the IOD evolutionary phase. IOD began to occur in May with a temperature of -0.5oC. Over time, IOD evolution reaches a peak in September-October with a temperature of -1.8oC and begins to experience evolutionary decay in November-December with a temperature of -0.2oC. IOD evolution that occurs on the surface is influenced by zone currents and surface wind movements that move to the left. The positive IOD movement to the west also affects the decrease in sea level in the west coast of Sumatra which is marked by a negative value of SSHA.   Keywords: Indian Ocean Dipole, Lowpass Filter, Temperature
Seasonal Variation of Ekman Transport in the Southern Waters of West Sumatra Siregar, Agustina; Anjasman, Anjasman; Johan, Septi; Norfahmi, Siti Hairunnisa; Lizalidiawati, Lizalidiawati
Jurnal Kelautan Tropis Vol 29, No 1 (2026): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v29i1.30594

Abstract

This study examines seasonal variations in Ekman transport in the southern waters of western Sumatra using wind, ocean current, and sea level data from the Copernicus Marine Service for the period 2023–2024.  Data analysis was conducted spatially and temporally using Panoply, Python, and ArcGIS software. The results show that Ekman transport dynamics are significantly influenced by changes in the direction and intensity of the Asian–Australian monsoon winds. Maximum transport values were identified in the East Season at 4-5 m3/s due to strengthening southeasterly winds, while minimum values occurred in the West Season at 1-2 m3/s when westerly winds dominated the region. These seasonal variations show a close relationship with changes in surface currents and sea level, reflecting the dynamic response of the oceanographic system to the influence of wind friction. These results reinforce the understanding that Ekman transport plays an essential role in controlling regional ocean circulation patterns and provides an important scientific basis for marine resource management in the waters west of Sumatra.
Pengaruh Hidrodinamika Pantai Padang Betuah Terhadap Parameter Fisis Danau Gedang Bengkulu Tengah Supiyati, Supiyati; Johan, Septi; Norfahmi, Siti Hairunnisa; Irkhos, Irkhos
Jurnal Kelautan Tropis Vol 29, No 1 (2026): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v29i1.30424

Abstract

Danau Gedang diduga sangat dipengaruhi oleh interaksi hirdodinamika dari laut akan tetapi hal ini belum ada kajian ilmiahnya. Dalam upaya mengoptimalkan potensi pemanfaatan Danau Gedang, dan pesisir pantai Padang Betuah maka penelitian ini bertujuan untuk menidentifikasi karakteristik hidrodinamika Pantai Padang Betuah dan parameter fisis Danau Gedang, serta pemetaan hidrodinamika Pantai Padang Betuah dan parameter Fisis Danau Gedang. Metode yang digunakan dalam penelitian ini adalah pengukuran in situ parameter hidrodinamika Pantai Padang Betuah dan parameter fisis Danau Gedang yang didukung dengan data citra satelit marine copernicus. Data diolah menggunakan software surfer, Arcgis, grad, dan WRPLOT yang selanjutnya dianalisis secara deskriptif dan kuantitatif. Hasil penelitian diperoleh karakteristik oseanografi Pantai Padang Betuah  diperoleh tipe pasang surut yang terjadi merupakan  tipe pasang surut campuran condong ke harian tunggal (Mixed Tide Prevailing Diurnal), yaitu dalam satu hari terjadi dua kali pasang dan dua kali surut, tetapi kadang – kadang untuk sementara waktu terjadi satu kali pasang dan satu kali surut dengan tinggi dan periode yang berbeda secara signifikan dengan bilangan formzal 0,63 dan tinggi muka laut rata-rata (MSL) sesaat yaitu 26,2 cm. Kecepatan arus rata-rata didapat sebesar 0,29 m/s  dan ketinggian gelombang rata-rata sebesar 0,23 m. Secara umum hidrodinamika pantai Padang Betuah sangat mempengaruhi karakteristik parameter fisis Danau Gedang, karena memiliki kecendrungan karakteristik yang hampir sama, dan sedimen yang terdapat di Pantai Padang Betuah dan Danau Gedang sama yaitu dominan pasir, diduga saat kondisi pasang pasir terbawa arus ke danau, hal ini ditunjukan dengan tekstur presentase nilai pasir yang lebih dominan di Danau Gedang yaitu 92,14%.
A Study of Oceanographic Conditions During the Tropical Cyclone Anggrek in the Coastal Area of Bengkulu Agustina, Rozylla; Supiyati, Supiyati; Johan, Septi; Norfahmi, Siti Hairunnisa
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 23, No 1 (2026): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v23i1.24120

Abstract

This research has not been discussed previously, especially in the waters of Bengkulu, which has a strategic position in relation to the formation and movement of tropical cyclones in the eastern Indian Ocean. The lack of research in this region has resulted in limited information on the direct impact of cyclones on oceanographic parameters. This study aims to identify the impact of tropical cyclone Anggrek on oceanographic parameters in Bengkulu waters during and after the occurrence of tropical cyclone Anggrek. This study is limited to the waters of Bengkulu with a focus on the period from January 15 to February 13, 2024. Reanalysis data from the Marine Copernicus numerical model was used and analyzed temporally with a quantitative descriptive approach, followed by a t-test: Paired Two Sample for Means. The results of the oceanographic parameter analysis showed significant changes due to the influence of Tropical Cyclone Anggrek in the waters of Bengkulu. Based on the results of the paired t-test, all main parameters showed significant differences  between normal conditions and cyclone conditions. Sea surface temperature decreased during the cyclone due to vertical mixing processes, then increased again after the cyclone moved away. Salinity values also showed significant differences. Wave height and current velocity experienced noticeable fluctuations, and wind speed conditions during Tropical Cyclone Anggrek generally increased. The results of this study provide updates to BMKG predictions and support the strengthening of early warning systems in the western coastal region of Sumatra, particularly in the waters of Bengkulu, by understanding changes in sea and atmospheric conditions after the cyclone.
Co-Authors Agustina, Rozylla Agustina, Tari Amalia, Isra anjasman, anjasman Anwar, Anang Arif Ismul Hadi Chandra Kurniawan, Chandra Dari, Evita Sri Wulan Devi Permata Sari Devicawati, Devicawati Edkayasa, Mardho Tillah Eko Risdianto Gerry, Muamar Gita Rahma Sari Halauddin Henny Johan Irkhos Irkhos Limbong, Rospita Naomi Lizalidiawati Lizalidiawati Muda Lubis, Ashar Norfahmi, Siti Hairunnisa Putri, Desy Hanisa Putri, Hestyna Eka Refrizon Riska Ekawita Rosyid, Muhammad Ilham Septianingsih, Dwi Silaban, Angeli Siregar, Agustina Sudirman Sudirman Supiyati . Suwarsono Suwarsono Umaya Umaya, Umaya Wahyuni, Ani Sri Widiasih, Widiasih XXX, SATURN