Establishing The Flood Map For The Downstream Of Vu Gia-Thu Bon Catchment – A Coastal Region Of Viet Nam Central. Scale Variability Of Inondation Area Under The Impact Of Climate Change

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Ngoc duong Vo, Philippe Gourbesville

Wednesday 1 july 2015

12:00 - 12:15h at North America (level 0)

Themes: (T) Extreme events, natural variability and climate change, (ST) Hydrological extremes: floods and droughts

Parallel session: 9I. Extreme events - Flood Drought

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In recent years, climate change is forecasted to occur more severely and complicatedly. Under the impact of variation of weather’s factors, especially the precipitation, flood extreme event is expected to increase not only the intensity but also the frequency. It is thought to have an influence on all aspects of human society in the next few years. Hence, responding actively with these changes is an urgent requirement today. Constructing the flood map with taking into account the impact of climate change is seen as a useful and an indispensable process in responding with this natural phenomenon. Vietnam is located in the region of the southeast Asia monsoon. Most of the population work in agriculture and inhabitants essentially concentrate at the coastal plain, Vietnam is one of the countries most heavily affected by the consequences of climate change. For these reasons, establishing flood map with climate change scenarios is mighty necessary for the coastal area in this country. This paper will present an issue in flood map construction at the downstream of Vu Gia Thu Bon catchment, the coastal region of Viet Nam central. This study is realized on Mike Flood model with the run off scenarios are inherited from Mike She model. The flood maps corresponding with tree GCMs under A2 scenario in the end of 21st century are built. Inundation areas with different return periods are also analyzed in this study. The results are hoped to provide adequate scientific evidences to help local authority make suitable strategies for adapting with the variation of climate in the future.