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All Journal Indonesian Journal of Geography JTERA (Jurnal Teknologi Rekayasa) Multidiciplinary Output Research for Actual and International Issue (Morfai Journal)
Abdillah, Muhammad Rais
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Seasonal Variability of Sea Surface Chlorophyll-a at West Borneo Island Radjawane, Ivonne Milichristi; Saleh, Ejria; Napitupulu, Gandhi; Abdillah, Muhammad Rais; Hassan, Mohd Azamuddin Mohd
Indonesian Journal of Geography Vol 56, No 1 (2024): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.87713

Abstract

The optimization of marine fisheries activities can be achieved through an understanding of the timing of fishing, access to good information, and knowledge of oceanographic conditions. These conditions often lead to significant nutrient enrichment in the surface layer of the ocean, which in turn increases the sea surface chlorophyll-a (SSC). In the context of the west Borneo Island region, seasonal variability in SSC plays a crucial role in determining potential fishing grounds. The objectives of this study are  examining the seasonal variability of SSC, identifying upwelling and downwelling processes through analysis of sea surface wind (SSW), and determining the climatological distribution of Sea Surface Temperature (SST) and sea surface height (SSH) within the water off Labuan Island, Malaysian Borneo, and the Karimata Strait, West Kalimantan, Indonesia. Remote sensing data spanning from 2007 to 2021 were analyzed, encompassing SSC, SST, SSH anomalies, SSW, wind stress curl, and Ekman pumping. Additionally, rainfall and river discharge were examined as supplementary indicators of these oceanographic processes. The findings indicate that SSW plays a pivotal role in driving upwelling and downwelling processes, which in turn influence SSC variability. In Labuan waters, upwelling occurs primarily from November to February, while downwelling predominates from June to September. In contrast, in the Karimata Strait, upwelling is identified from July to September, with downwelling prevalent between March and May. Upwelling events in both regions are characterized by increasing SSC, accompanied by decreasing SST and SSH, while the opposite trends are observed during downwelling events. The peak of rainfall and river discharge in December is noted to potentially enhance SSC variability in the Karimata Strait compared to Labuan Island waters.
Dampak Aerosol Korosif pada Peralatan Distribusi Listrik PLN di Wilayah Pesisir Laut dan Implikasinya terhadap Keandalan Sistem Putra, Wildan Arya; Octavia, Farah Rizki; Hadi, Shamsul; Trilaksono, Nurjanna Joko; Abdillah, Muhammad Rais
JTERA (Jurnal Teknologi Rekayasa) Vol 10, No 1: Juni 2025
Publisher : Politeknik Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31544/jtera.v10.i1.2025.99-104

Abstract

Korosi yang dipicu oleh paparan aerosol korosif di wilayah pesisir merupakan salah satu tantangan utama dalam menjaga keandalan sistem distribusi listrik. Penelitian ini bertujuan untuk mengidentifikasi dampak korosi terhadap peralatan distribusi listrik milik PLN, seperti konduktor A3C, bracket, dan suspension, yang mengalami kerusakan signifikan akibat kondisi lingkungan korosif di wilayah pesisir Pangandaran. Faktor-faktor seperti tingginya kadar garam di udara, kelembapan tinggi, dan paparan angin laut terbukti mempercepat laju korosi, yang berujung pada kerusakan infrastruktur distribusi serta gangguan pasokan listrik kepada ribuan pelanggan. Studi ini juga mengevaluasi langkah-langkah mitigasi yang dapat diterapkan, termasuk penggunaan material tahan korosi, aplikasi pelapisan protektif, serta pelaksanaan inspeksi dan pemeliharaan secara rutin. Hasil penelitian ini diharapkan menjadi dasar dalam perumusan strategi peningkatan keandalan distribusi listrik di kawasan pesisir.
THE IMPACT OF ENSO PHENOMENA ON ELECTRICITY PRODUCTION AT MRICA HYDROELECTRIC POWER PLANT IN CENTRAL JAVA (2013-2023) Parsaulian, Kevin Sahat; Abdillah, Muhammad Rais
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 5 No. 2 (2025): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/morfai.v5i2.2810

Abstract

This study investigates the impact of the El Niño Southern Oscillation (ENSO) on electricity production at the Mrica Hydroelectric Power Plant (PLTA Mrica) in Central Java from 2013 to 2023. ENSO is global climate phenomenon, influences rainfall and ocean circulation in various regions, including Indonesia. Data on rainfall and river discharge from the Serayu River were analyzed to determine how ENSO affects the operational efficiency of PLTA Mrica. The study reveals that strong El Niño events, such as those in 2015, significantly reduced river discharge, leading to decreased electricity production. Conversely, the La Niña event in 2020 increased river discharge, enhancing electricity production. The findings underscore the critical need for adaptive water resource management and continuous monitoring to optimize electricity generation at PLTA Mrica, particularly in the face of climate variability induced by ENSO. This research contributes to understanding the relationship between climate phenomena and hydroelectric power generation.
Co-Authors Gandhi Napitupulu Hadi, Shamsul Hassan, Mohd Azamuddin Mohd Octavia, Farah Rizki Parsaulian, Kevin Sahat Putra, Wildan Arya Radjawane, Ivonne Milichristi Saleh, Ejria Trilaksono, Nurjanna Joko