Author(s): Andi Egon; Faruq Khadami; Iwan Pramesti Anwar; Karina Aprilia Sujatmiko; Farrah Hanifah; Bayu Purnama
Linked Author(s): Andi Egon
Keywords: Numerical Model Salinity MIKE 21 Climate Change
Abstract: The Berau continental shelf (BCS) in Indonesia, located on the eastern coast of Kalimantan, is home to abundant coastal and marine ecosystems, including coral reefs. The region is home to over 500 species and receives its primary freshwater source from the Berau River estuary. However, global climate change, including increased rainfall and extreme weather events, can significantly impact these ecosystems, particularly coral reefs. This study investigates the impact of increased wind speed and rainfall rate on the distribution of plumes on BCS following their release from the Berau estuary, estimating the extent of distribution essential for sensitive receptors in this rich biodiversity area. The study used DHI's MIKE 21 Flow Model FM model simulation, which extends from the Berau River to about 100 km offshore, covering the Derawan islands. The model simulation revealed that an increase in discharge rate and stronger wind affect the dispersion of lower salinity water in the study area. Wind direction and pattern also influence plume distribution in BCS. However, the study has limitations, such as the daily modelled data and the lack of direct incorporation of anthropogenic factors like land use changes upstream of the Berau Estuary.
Year: 2025