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Numerical simulation for estimating of sediment transport due layouts of port

AIP Conference Proceedings 2017年第1期1892卷

作者： Sri Hartuti Nengsih Fachrurrazi Syamsidik Shigeru Kato 1Tsunami Computation and Visualization Laboratory of Tsunami and Disaster Mitigation Research Center (Syiah Kuala University Jl. Prof. Ibrahim Hasan Gampong Pie Banda Aceh Indonesia) 2Tsunami Computation and Visualization Laboratory of Tsunami and Disaster Mitigation Research Center (Syiah Kuala University Jl. Prof. Ibrahim Hasan Gampong Pie Banda Aceh Indonesia) 1 23Tsunami Computation and Visualization Laboratory of Tsunami and Disaster Mitigation Research Center (Syiah Kuala University Jl. Prof. Ibrahim Hasan Gampong Pie Banda Aceh Indonesia) 1 3Civil Engineering Departement Syiah Kuala University (Jl. Syeh Abd Rauf No. 7 Banda Aceh Indonesia) 4Department of Architecture and Civil Engineering Toyohashi University of Technology (1-1 Tempaku-Cho 441-8580 Aichi Prefecture Japan)

The need for a new and improved fisheries port has significantly increased in the Bireuen District of Aceh, particularly in Peudada due to several factors presented in this paper. During this time the fishing port used by the communities located in the river channel makes it difficult for the fishermen to get into the port area due to the shallowness of the mouth of the estuary. Port master plan study is required to examine several possible locations for the proposed port. In planning the hydro-oceanographic aspects of the port is an essential requirement to determine the layout of a port. Several factors that need to be reviewed relating to the layout of the ports include sedimentation, waves, and currents. These factors affect the movement of the ship, tranquility waves in the port basin, and for the maintenance dredging of the harbor due to sedimentation. This study is aimed at estimating the best layout of the port basin between two scenarios due to the sedimentation process, waves propagation, and currents. The software used in this study is Delft3D developed by Deltares. The program can simulate waves, currents and sediment transport in coastal areas by using schematized grids. The simulation was performed under two scenarios port layout using three dominant wind direction influencing wave generation, i.e., Northwest, North, and Northeast. All two scenarios modeled by changing the direction of opening the mouth of the harbor. After one year, both scenarios simulation has created a new bathymetry map to select the best port layout based on smallest sedimentation volume.

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Preliminary study on performance of a coupled hydrodynamic and sediment transport model on small domain

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AIP Conference Proceedings 2017年第1期1892卷

作者： Teuku M. Rasyif Shigeru Kato Syamsidik Takumi Okabe 1Dept. of Architecture and Civil Eng. Toyohashi University of Technology 1-1 Tempaku Cho Toyohashi Aichi 441-8580 Japan 2Dept. of Architecture and Civil Eng. Toyohashi University of Technology 1-1 Tempaku Cho Toyohashi Aichi 441-8580 Japan 3Civil Engineering Department Syiah Kuala University Jl. Prof. Dr. Ibrahim Hasan Gampong Pie Banda Aceh 23233 Indonesia 4Tsunami Computation and Visualization Laboratory Tsunami and Disaster Mitigation Research Center (TDMRC) Syiah Kuala University Jl. Prof. Dr. Ibrahim Hasan Gampong Pie Banda Aceh 23233 Indonesia 5Dept. of Architecture and Civil Eng. Toyohashi University of Technology 1-1 Tempaku Cho Toyohashi Aichi 441-8580 Japan

Numerical simulation is one of the useful tools to analyze natural phenomena in the earth such as the tsunami disaster. Several numerical models can simulate the tsunami wave from its generation, propagation, and inundation. However, most tsunami models do not include the sediment transport module. The tsunami wave actually induces a lot of sediment during the propagation in the coastal area. In the case of Indian Ocean tsunami in 2004, massive morphological changes were caused by the tsunami waves around Sumatra coast. In Aceh, some areas eroded by the tsunami wave were living place for a local community. It is indispensable for the resident in the coastal area to estimate the risk of morphological changes due to a tsunami wave. Therefore, a model that can investigate the morphological changes due tsunami wave is necessary. The result of this model can be used to consider a countermeasure for tsunami wave impact in the coastal area, such as land-use management and planning. The COMCOT-SED model had been developed by several researchers. This model combines the hydrodynamic module and the sediment module. The aim of this study is to get general information about performance of the COMCOT-SED model and to modify the model for more accurate results. Firstly, the model was demonstrated in the ideal condition to confirm the model validity. Then, we evaluated the model performance comparing the model results and the laboratory experiment data which was conducted by other researcher. The authors found that the results of water level and bottom profile by the original model in the ideal condition are not suitable. The model modification will give us more suitable results. The modified model will be applied to simulate the tsunami wave and sediment transport in the small area.

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