Author(s): Adriano Rolim Da Paz; Walter Collischonn; Carlos E. M. Tucci
Linked Author(s):
Keywords: Floodplain; Pantanal; Hydrologic modeling
Abstract: The hydrology and hydrodynamics constitute some of the main governing factors of ecosystem functioning and thus its mathematical representation plays a key role to ecological studies and to water resources planning and management. Several methodologies have been applied to streamflow simulation. However, rivers with large floodplains need a more specific mathematical methodology to represent then, owing to occurrence of huge volumes of water exchanged between main channel and floodplain and appearence of secondary fluxes in the floodplain. Rivers in the Upper Paraguay River Basin, in the Brazilian Pantanal, present such hydrologic pattern. This paper presents a methodology to integrated modeling of main channel and floodplain. The proposed methodology consists of combining a one-dimensional hydrodynamic model applied to the main channel and a raster-based model applied to the floodplain. Such methodology was applied to Aquidauana River, in the river reach between the river gauging stations of Aquidauana and Porto Ciriaco. The time period from december/1999 to may/2000 was simulated and interesting results were achieved, such as the hydrograph falling from upstream to downstream closely to the observed values and the occurrence of a kind of maximum discharge in the hydrograph at Porto Ciriaco river section. Flood extent propagation along the floodplain was simulated by the raster-based model, representing the secondary fluxes independently of the main river flux.
Year: 2007