Author(s): Alamsyah Kurniawan, Ulung Jantama Wisha, Semeidi Husrin, Entin A. Karjadi
Linked Author(s): Alamsyah Kurniawan
Keywords: Tidal bore, estuaries, hydrodynamic models, bono, Kampar River Indonesia
Abstract: Tidal bore travels up from estuary to a river against the direction of the river's flow. This phenomenon is a fascinating event as in Kampar River, Indonesia. However, according to the locals, the magnitude of the tidal bore of Kampar known as �Bono� has been decreasing significantly, which may be due to the changes in the physical and hydrodynamic conditions at the estuaries and the river. A better understanding of these processes may help in conservation and restoration of the tidal bore phenomenon. Present work introduces and analyses the physical processes of 4 (four) rivers (i. e. Kampar, Rokan, Indragiri and Siak) along the eastern side of Sumatra Island. Tidal bore generation is analyzed using hydrodynamic models in the estuaries and is validated by field measurement of tides in the river mouth. The model covers Malacca Strait in which the boundaries lie at Andaman Sea, South China Sea and Java Sea. Temporal distributions and comparisons between simulated and observed tidal results suggested that tidal conditions of the 4 (four) estuaries can be analyzed based on the model output. Detailed behavior of the tidal at each estuary is then analyzed qualitatively based on the measured tidal bore upstream taking into consideration the river morphology. A better understanding of these processes may contribute to better management practices in tidal bore affected rivers and estuaries, including Bono of the Kampar river in Indonesia
Year: 2017