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All Journal Asian Journal of Aquatic Sciences
Benny Heltonika
Department of Aquaculture, Faculty of Fisheries and Marine Sciences, UNRI
Agriculture, Biological Sciences & Forestry

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OCEANOGRAPHIC DYNAMICS AND THEIR EFFECTS ON SEDIMENTATION RATES  IN THE MESJID RIVER ESTUARY, DUMAI Ilham Ilahi; Mubarak Mubarak; Nabila Afifah Azuga; Gita Purnama Sari; Vina Rahmadhani; Benny Heltonika
Asian Journal of Aquatic Sciences Vol. 9 No. 2 (2026): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.9.2.261-268

Abstract

This study analyzes the oceanographic dynamics (bathymetry, tides, and shoreline changes) and their impact on sedimentation rates in the Mesjid River estuary, Dumai, Indonesia, which faces the Malacca Strait. The research was conducted from July to September 2025 at two stations using sediment traps, bathymetric surveys, and NDVI analysis for mangrove cover. The results show an estuarine depth ranging from 2.34, with significant shallowing at the river mouth. The tidal pattern is classified as mixed, with a semidiurnal predominance (Formzahl number = 0.43). Shoreline change analysis indicates that abrasion from ship-generated waves and mangrove degradation dominate. The average sedimentation rate reached 7.22 cm/year, with the highest accumulation observed at the estuary mouth due to current deceleration and sediment trapping by mangrove roots. Oceanographic dynamics and anthropogenic pressures amplify sedimentation in this tropical estuary.
Co-Authors Gita Purnama Sari Ilham Ilahi Mubarak Mubarak Nabila Afifah Azuga Vina Rahmadhani