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Heron Surbakti
Jurusan Ilmu Kelautan FMIPA, Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Environmental Science Health Professions Immunology & microbiology Library & Information Science Materials Science & Nanotechnology Mathematics Nursing Physics Public Health Social Sciences

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Journal : Journal of Fisheries

 1 
Identification of Physical Process of RoFI (Region of Freshwater Influenced) at Banyuasin Estuary, South Sumatera of Indonesia Muh. Adhim Adrian; I Wayan Nurjaya; Dietriech Geoffrey Bengen; Jonson Lumban Gaol; Heron Surbakti
Jurnal Ilmiah Perikanan dan Kelautan Vol. 18 No. 1 (2026): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v18i1.81693

Abstract

Graphical Abstract   Highlight Research The large river discharge from several tributaries causes strong stratification in the Banyuasin Estuary. RoFI in the Banyuasin Estuary does not only occur seasonally, but can also occur in daily cycles. Tidal dynamics control RoFI dynamics in the Banyuasin Estuary. Estuarine plumes formed on the surface based on synoptic imagery prove that RoFI can also extend seasonally.   Abstract The Region of Freshwater Influence (RoFI) is the river-sea transition zone where freshwater, suspended materials, and associated properties are exchanged and redistributed by estuarine dynamics. This study is the first to identify RoFI and contributes to increasing primary productivity in aquatic environments. This research aims to identify physical processes such as tides and currents in the RoFI based on observational CTD data. CTD measurements (14 stations) collected data salinity, temperature, density, and turbidity, visualized using ODV. Tidal and current data identified RoFI dynamic controls. Sentinel-2A imagery mapped the surface plume. RoFI dynamics exhibit significant seasonal and daily changes. Low salinity 10–15 PSU, indicating freshwater intrusion, dominates, with residual currents typically ranging from 0.1 m/s to 0.2 m/s. PCA analysis 91.32% variability demonstrates that the RoFI expands during ebb tide and narrows during flood tide due to estuarine intrusion of high-salinity oceanic currents. RoFI in the Banyuasin estuary introduce freshwater, nutrients, suspended particulates, and even pollutants that can cause large-scale detriment. Therefore, the recommendations given are that the protection of spawning and nursery areas, as well as the control of aquaculture waste, should be prioritized to minimize pressure on fishery resources.
Co-Authors ., ardani Affandi, Azhar Kholik Agustin Rustam Alexander A Aritonang Alexander A Aritonang, Alexander A Andi Agussalim, Andi Anna I S Purwiyanto Anna I S Purwiyanto, Anna I S Anzari, Ridho ardani . Arifelia, Destri Rizki Arsyei, Laksamana Fachryzal Atik Hendika Lyusta Azhar Kholik Affandi Bambang Aditya Nugraha Bengen, Detriech G Chaplin M Simatupang Chaplin M Simatupang, Chaplin M Christie Indah Sari Christie Indah Sari, Christie Indah Defin Ari Pastra Destri Rizki Arifelia Dianysah, Gusti Dietrich G Bengen Dwi Puspa Indriani Dwi Sapto Widodo Erwin F Silalahi Fajri, M. Awaluddin Fauziyah Fauziyah . Fauziyah Fauziyah Fauziyah Fauziyah Fereddy Yulianus Napitupulu Fernandho Simbolon Fernandho Simbolon, Fernandho Fitri Agustriani Gunawan, Elza Anggarini Gusti Diansyah Gusti Diansyah Gusti Dianysah Hartoni . Hartoni . Hartoni . hartoni . Hartoni ., Hartoni Hendro H Sinaga Hilmaturosyidah, Hilmaturosyidah I Wayan Nurjaya Isnaini Isnaini Isnaini . Isnaini . Isnaini ., Isnaini Johan Risandi Jonson Lumban Gaol La Ode Nurman Mbay La Ode Nurman Mbay La Ode Nurman Mbay, La Ode Nurman Ladys, Maria Lucky Pratama Lyusta, Atik Hendika M. Albab Al Ayubi M. Albab Al Ayubi, M. Albab Al M. Awaluddin Fajri M. Yogi Riyantama Isjoni Maria Ladys Melki Melki Melki Melki Melki Muh. Adhim Adrian Muhammad Hendri Mulia Purba Mulyadi Mulyadi Nanda Nurisman Ningsih, Ellis Nurjuliasti Nurisman, Nanda Nurul Fitriya Nurul Fitriya Pastra, Defin Ari Pratama, Lucky Purwiyanto, Anna R. Bambang Adhitya Nugraha R. Bambang Adhitya Nugraha Raisyah Salsabilah Ramadoni Ramadoni Ramadoni, Ramadoni Ramsen Napitu, Ramsen Rezi Apri Rian Andriansyah Ridho Anzari Rika Dwi Susmiarni Rika Dwi Susmiarni, Rika Dwi Rio Demak Hasibuan Rio Demak Hasibuan, Rio Demak Riris Aryawati Rizky Adolf A Saing Robinson Sitepu Romega Sinaga Rozirwan . Saing, Rizky Adolf A Salsabilah, Raisyah Sarno . Sarno . Silalahi, Erwin F Sinaga, Romega Susanti, Ester Mei Syamsiar, Syamsiar Tengku Zia Ulqodry Tengku Zia Ulqodry Tri Prartono Ulqodry, T. Utami, Risnita Widodo, Dwi Sapto Wike Ayu Eka Putri Yundari, Yundari