| Modelling extraordinary floods and sedimentological processes in a large channel-floodplain system of the Lower Paran River(Argentina) |
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| 引用本文： | Marina L.Garcia,Pedro A.Basile,Gerardo A.Riccardi,José F.Rodriguez.Modelling extraordinary floods and sedimentological processes in a large channel-floodplain system of the Lower Paran River(Argentina)[J].国际泥沙研究,2015(2):150-159. |
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| 作者姓名： | Marina L.Garcia Pedro A.Basile Gerardo A.Riccardi José F.Rodriguez |
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| 作者单位： | Hydraulics Department,School of Civil Engineering,Faculty of Exact Sciences,Engineering and Land Surveying,National University of Rosario;Centre for Hydro-Environmental Research,Faculty of Exact Sciences,Engineering and Land Surveying,National University of Rosario;Research Council of National University of Rosario(CIUNR);Civil,Surveying and Environmental Engineering,University of Newcastle |
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| 基金项目： | the framework of a doctoral scholarship from CONICET for the first author;research projects PID UNR19-I161,19-I269,and 19-I270 from the National University of Rosario,Argentina |
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| 摘 要： | A quasi-2D unsteady flow and sediment transport model suitable for the simulation of large lowland river systems,including their floodplains,is presented.The water flow and sediment equations are discretised using an interconnected irregular cells scheme,in which different simplifications of the 1D de Saint Venant equations are used to define the discharge laws between cells.Spatially-distributed transport and deposition of fine sediments throughout the river-floodplain system are simulated.The model is applied over a 208-km reach of the Parana River between the cities of Diamante and Ramallo(Argentina) comprising a river-floodplain area of 8100 km~2.After calibration and validation,the model is applied to predict water and sediment dynamics during synthetically generated extraordinary floods of100,1000,and 10,000 years return period.The potential impact of a 56-km long road embankment constructed across the entire floodplain is simulated and compared to model results without the embankment.The embankment results in increases in upstream water levels,inundation extent,flow duration,and sediment deposition.
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| 关 键 词： | Fluvial hydraulics Numerical modelling Floodplain sedimentation Lowland rivers Parana River |
Modelling extraordinary floods and sedimentological processes in a large channel-floodplain system of the Lower Paraná River (Argentina) |
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| Marina L. Garcia,Pedro A. Basile,Gerardo A. Riccardi,José F. Rodriguez.Modelling extraordinary floods and sedimentological processes in a large channel-floodplain system of the Lower Paraná River (Argentina)[J].International Journal of Sediment Research,2015(2):150-159. |
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| Authors: | Marina L Garcia Pedro A Basile Gerardo A Riccardi José F Rodriguez |
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| Institution: | 1. Hydraulics Department, School of Civil Engineering, Faculty of Exact Sciences, Engineering and Land Surveying, National University of Rosario, Argentina
2. Civil, Surveying and Environmental Engineering, University of Newcastle, Newcastle, Australia |
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| Abstract: | A quasi-2D unsteady flow and sediment transport model suitable for the simulation of large lowland river systems,including their floodplains,is presented.The water flow and sediment equations are discretised using an interconnected irregular cells scheme,in which different simplifications of the 1D de Saint Venant equations are used to define the discharge laws between cells.Spatially-distributed transport and deposition of fine sediments throughout the river-floodplain system are simulated.The model is applied over a 208-km reach of the Parana River between the cities of Diamante and Ramallo(Argentina) comprising a river-floodplain area of 8100 km~2.After calibration and validation,the model is applied to predict water and sediment dynamics during synthetically generated extraordinary floods of100,1000,and 10,000 years return period.The potential impact of a 56-km long road embankment constructed across the entire floodplain is simulated and compared to model results without the embankment.The embankment results in increases in upstream water levels,inundation extent,flow duration,and sediment deposition. |
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| Keywords: | Fluvial hydraulics Numerical model ing Floodplain sedimentation Lowland rivers Paraná River |
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