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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.

Coastal recovery at tsunami affected areas is another challenging work for practitioners. Pressures from demand to acquire ample and suitable land to restart economy activities and from harmonizing nature with the development are among the reasons why the coastal recovery may enter into complicated decision process. This chapter elaborates lessons learned from coastal recovery process around Banda Aceh to restore coastal lines around this area after severely damaged by the Indian Ocean Tsunami waves in 2004. A time series of maps to show the coastal morphological dynamics around Banda Aceh was used to compare the coastal features between 2004 and 2011 conditions. Other similar studies focusing on the coastal recovery around this area were also included to strengthen the lessons of the coastal recovery process orchestrated after the tsunami. Four coastal locations around Banda Aceh were selected to show the different approaches used to recover the coasts and impacts on the area after the efforts.