ANALISIS KARAKTERISTIK MASSA AIR DI ZONA ROFI (REGION OF FRESHWATER INFLUENCE) PERAIRAN MUARA SUNGAI BANYUASIN, SUMATERA SELATAN

MANALU, ELISABET CAROLINE BR. and Surbakti, Heron and Nur, Muhamad (2025) ANALISIS KARAKTERISTIK MASSA AIR DI ZONA ROFI (REGION OF FRESHWATER INFLUENCE) PERAIRAN MUARA SUNGAI BANYUASIN, SUMATERA SELATAN. Undergraduate thesis, Sriwijaya University.

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Abstract

The Banyuasin River estuary is a dynamic and complex semi-enclosed estuary, heavily influenced by the interaction between freshwater from the mainland and saltwater from the sea. The ROFI (Region Of Freshwater Influence) zone in this area has physical characteristics influenced by temperature, salinity, currents, and tides. This study aims to analyze variations in temperature and salinity, the distribution of freshwater fractions, and the influence of oceanographic dynamics on water mass characteristics in the ROFI zone of the Banyuasin River Estuary. Data collection was conducted from October 13–16, 2024, in situ using CTD (Conductivity, Temperature, Depth) at 10 observation stations. Current data were measured using a floating droadge, and tidal data were obtained from SRGI-BIG. Data analysis was performed using Ocean Data View (ODV) software to generate vertical and horizontal spatial distributions of water masses, as well as to calculate freshwater fractions and freshwater transport volumes. The results show that the study area has a mixed tidal type leaning toward a single daily tide with a Formzahl value of 2.77. The highest surface temperature reached 33°C and the lowest salinity was 9.1 PSU, indicating strong stratification at a depth of 2–4 meters. Surface currents move upstream during high tide (0.03–0.34 m/s) and seaward during low tide (0.008–0.36 m/s). The highest freshwater fraction was found upstream at 0.73, while the maximum transport volume during low tide was recorded at 1973.8 m³/s.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Dinamika Oseanografi, Fraksi Air Tawar, Muara Sungai Banyuasin, ROFI, Stratifikasi Massa Air
Subjects:	Q Science > Q Science (General) > Q1-295 General Q Science > QC Physics > QC1-75 General Q Science > QD Chemistry > QD450-801 Physical and theoretical chemistry
Divisions:	08-Faculty of Mathematics and Natural Science > 54241-Marine Science (S1)
Depositing User:	Elisabet Caroline Br. Manalu
Date Deposited:	15 Aug 2025 08:00
Last Modified:	15 Aug 2025 08:00
URI:	http://repository.unsri.ac.id/id/eprint/182825

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