Morphological uncertainty in flood modelling case Study at downstream of Vu Gia Thu Bon catchment, VietNam.

Vo Ngoc Duong⁽¹⁾, Philippe Gourbesville⁽²⁾, Thai Phuc Thuan⁽³⁾

⁽¹⁾Faculty of Water Resource Engineering, University of Science and Technology, the University of Da Nang, ⁽²⁾Nice Sophia Antipolis University, Polytech Nice Sophia, Innovative City lab URE 005, France. ⁽³⁾Central Viet Nam Institute of Water Resource, Vietnam. 

Abstract:

This study via the 2D hydraulic modeling at the downstream of Vu Gia Thu Bon catchment, a coastal region in Viet Nam central, will estimate the impact of different topography data to flood simulation. The study also presents the uncertainties of topography data when modelling flood events. These simulations are carried out on Mike 21 of DHI. The results might show strong and weak points of each kind of topography data. They could help modelers to get several judgments when deciding the resolution of topography, data sourceto build the flood map. This study is expected to give some usefulnesses for flood modeling in the coastal part of a big catchment.

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