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Modeling large-scale inundation of Amazonian seasonally flooded wetlands

Abstract : This paper presents the first application and validation of a 2D hydrodynamic model of the Amazon at a large spatial scale. The simulation results suggest that a significantly higher proportion of total flow is routed through the floodplain than previously thought. We use the hydrodynamic model LISFLOOD-FP with topographic data from the Shuttle Radar Topography Mission to predict floodplain inundation for a 240 × 125 km section of the central Amazon floodplain in Brazil and compare our results to satellite-derived estimates of inundation extent, existing gauged data and satellite altimetry. We find that model accuracy is good at high water (72% spatial fit; 0.99 m root mean square error in water stage heights), while accuracy drops at low water (23%; 3.17 m) due to incomplete drainage of the floodplain resulting from errors in topographic data and omission of floodplain hydrologic processes from this initial model.
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Submitted on : Friday, December 18, 2009 - 6:11:44 PM
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Matthew Wilson, Paul Bates, Doug Alsdorf, Bruce Forsberg, Matthew Horrit, et al.. Modeling large-scale inundation of Amazonian seasonally flooded wetlands. Geophysical Research Letters, American Geophysical Union, 2007, 34, pp.L15404. ⟨10.1029/2007GL030156⟩. ⟨hal-00442256⟩



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