Tokyo Metropolitan University Department of Civil and Environmental Engineering Numerical Modeling of Saline Intrusion in the Red River Delta, Vietnam A perspective of climate change and sea level rise PhD Student: NGUYEN Hoang Duc Supervisor: Motohiko UMEYAMA

Red Rive Delta Hanoi’s 1000th Anniversary The RRD has rich cultural traditions. The delta plays an important strategic role in the socio-economic development in the Northern provincial area The total area: 16,444 km2 The population: almost 17 million The RRD consists of 9 provinces including several big cities such as Hanoi, Hai Phong, Hai Duong, Bac Ninh, and Thai Binh The Red River Delta possesses rich cultural traditions. The average population density for the entire basin is about 280-person/km2 in 2010. However, with almost 17 million people living in the delta, the RRD is one of the most densely populated rural areas in the world.

Problems The major disasters: Flood Storm Inundation Erosion/Sedimentation Salinity intrusion

Salt intrusion in multi connected estuaries in the RRD Present problems Increase of water demand Decrease of freshwater supply Climate change and sea level rise Saltwater pollution Trend of sea level rise Monthly rainfall, evaporation and discharge Objectives Investigate saltwater distribution Evaluate the influence of discharge, tide, and geometry on salinity intrusion Develop a method to predict the spatial salinity distribution Manage water resources adapts to climate change and sea level rise Computed results Field measurements in January, 2006

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