Flood mapping for downstream of Ben Hai River, Vietnam

Abstract

Flood map nowadays is seen as an indispensable tool in urbanism, flood prevention and mitigation. For this reason, establishing flood map is mighty necessary for developing the socio economy of a river catchment. Ben Hai is the second largest river at Quang Tri province – Viet Nam central region. Besides the positive role towards the local socio economic development, the Ben Hai river in resent years has caused lots of disasters, specially on inundation. With the aim of providing an overview for mitigating the natural disaster consequences, the study is used the MIKE FLOOD-DHI to represent the Ben Hai river flooding. The model is set up for an area up to 100 km2. The flood maps are established with five historical flood events and several assumptions. The result is expected to provide the basic scientific evident for local authority to redude the impact of natural disaster, also for sustainable development.