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Water 2017, 9(11), 879; https://doi.org/10.3390/w9110879

A Combined Hydrological and Hydraulic Model for Flood Prediction in Vietnam Applied to the Huong River Basin as a Test Case Study

1
National Hydro-Meteorological Service, National Center for Hydro-Meteorological Forecasting, 8 Phao Dai Lang Street, Dong Da District, Ha Noi 100000, Vietnam
2
Department of Hydrology and Hydraulic Engineering, Vrije Universiteit Brussel, Pleinlaan 2, Brussels 1050, Belgium
*
Author to whom correspondence should be addressed.
Received: 25 September 2017 / Revised: 25 October 2017 / Accepted: 7 November 2017 / Published: 11 November 2017
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Abstract

A combined hydrological and hydraulic model is presented for flood prediction in Vietnam. This model is applied to the Huong river basin as a test case study. Observed flood flows and water surface levels of the 2002–2005 flood seasons are used for model calibration, and those of the 2006–2007 flood seasons are used for validation of the model. The physically based distributed hydrologic model WetSpa is used for predicting the generation and propagation of flood flows in the mountainous upper sub-basins, and proves to predict flood flows accurately. The Hydrologic Engineering Center River Analysis System (HEC-RAS) hydraulic model is applied to simulate flood flows and inundation levels in the downstream floodplain, and also proves to predict water levels accurately. The predicted water profiles are used for mapping of inundations in the floodplain. The model may be useful in developing flood forecasting and early warning systems to mitigate losses due to flooding in Vietnam. View Full-Text
Keywords: flood prediction; inundation mapping; WetSpa; HEC-RAS; Huong River; Vietnam flood prediction; inundation mapping; WetSpa; HEC-RAS; Huong River; Vietnam
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Mai, D.T.; De Smedt, F. A Combined Hydrological and Hydraulic Model for Flood Prediction in Vietnam Applied to the Huong River Basin as a Test Case Study. Water 2017, 9, 879.

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