Water · 2017 · 54 citations · 21 references
Natural ResourcesEarth SciencesHydrologyFlood HydrologyHydrologic ModelingWater Resources EngineeringDistributed Hydrologic ModelingFlood ForecastingFlood Inundation ModelingFloodplain HydrologyHydraulic ModelingHydrological ModelingFlood Early Warning SystemsFlood ModelingFloodplain Water Surface ProfilesHydraulic Flood ModelingHydraulic Modeling For FloodsHydrologic Model ValidationHydrological Model ValidationInundation Mapping
A combined hydrological and hydraulic model is presented for flood prediction in Vietnam. The model, comprising the WetSpa distributed hydrologic component for upper‑basin flood generation and the HEC‑RAS hydraulic component for downstream floodplain inundation, was calibrated with 2002–2005 flood data, validated with 2006–2007 data, and its predicted water profiles were used to map inundations in the Huong River basin. The combined WetSpa–HEC‑RAS model accurately predicts flood flows, water levels, and inundation extents, indicating its potential usefulness for flood forecasting and early warning systems in Vietnam.
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.
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