AN APROACH FOR HURRICANE WAVE MODELLING IN VIETNAM CENTRAL REGION. Ngoc Duong Vo 1 , N.Q. Binh 1 , Cong Phong Nguyen 2 and Philippe Gourbesvill 3 Abstract: Coastal zone plays a very important role in Vietnam socio-economic develop-ment, especially with the central region. However, the coastal line in Vietnam central region has been changed seriously. It becomes more complicately in recent years when shoreline erosion has occurred in many localtities. The consequence of this natural phenomenon has affected significantly to these area. The sea level rise and typhoon wave are considered as the main causes of unexpected phenom-enon. With the aim of mitigating the impact of typhoon wave to coastal line in ce-tral Vietnam, this study is realised. By using Mike softwave family of DHI for coastal zone from Binh Dinh to Binh Thuan, Viet Nam, the result will allow not only us to understand, predict and design mitigation measures to combat the ef-fects of these typhoons, it will also allow us to develop a methodology to be used elsewhere on the Viet Nam coast. The model is calibrated and validated versus water leve data of Quy Nhon station and of two other temporary stations in cen-tral area, also comparered to WAVEWATCH III model result with high perfor-mance. Result from four different typhoon scenario ( from level 6 to level 12) are analysed to provide basic information about the wave situation then estimating their impact to study area. Keywords: tropical hurricane, wave modelling, Vietnam central coast, INTRODUCTION Vietnam’s Easten Sea is located in the Pacific Northwest region, where the number of storms and tropical cysclone arises and operates with the highest ranking compared to other areas on earth (Fig. 1). A review of tropical cyclone-generated storm surges: Global data sources, observations, and impacts, the study of shows that this region is annually hit around 26 Tropical Cyclones (“National Institute of Informatics,” n.d.). It causes lost of disasters and affects significantly on socio economy development. With 3,260 km of coastal line, Vietnam is one of the most vulnerable countries against coastal disasters, especially storm surges caused by tropical cyclones (vulnerability of coastal areas in southern vietnam against tropical cyclones and storm surges). The problem is more severe towards Vietnam central region where is judged to be the most vulnerable to natural disaster. This region is attacked by four 1 University of Science and Technology, The University of Danang, Vietnam 2 Southern Institute of Water Resource Research, Viet Nam 3 Polytech’Lab, Polytech’ Nice Sophia, University of Nice Sophia Antipolis, France. typhoons per year. Due to the violence of climatological events, the fragile economic condition and the underdeveloped infrastructure, the natural disasters related to typhoon deeply affect the socio-economy (Dorel et al., 2016). One of negative impact of typhoon for coastal zone is the erosion. This issue is become a hot topic of many localities in over the region. According to statistics, along the Vietnam Central Coast, there are 88 erosion sites with a total length of more than 120 km. The eroded situation is seen to be more compliated and catastropic during the storm season (BOATENG, 2009). It is registered during the past few years in Thua Thien - Hue; Cua Dai beach, Hoi An city, Quang Nam province; Tuy Hoa city, Phu Yen province; Phan Thiet city, La Gi town, Binh Thuan and Cua Dai provinces (Quang Ngai); Tam Quan and Cua An Du outlet, Binh Dinh province. Proceedings of the 10 th International Conference on Asian and Pacific Coasts (APAC 2019) Hanoi, Vietnam, September 25-28, 2019 © Springer Nature Singapore Pte Ltd. 2020 N. Trung Viet et al. (eds.), APAC 2019, https://doi.org/10.1007/978-981-15-0291-0_83 601