Modélisation tridimensionnelle des remontées de nappe et inondations au Val d’Avaray
Keywords:
flooding, groundwater rising, coupled modelAbstract
Dikes of earth called levees protect independent floodplains called "vals" of the Loire river in France that lie lower than the water level during floods. Infiltration through these levees leads to the flooding of floodplains not by overtoping but by phreatic surface rising. In order to better assess the exfiltration flow leading to the flooding of "vals", groundwater rising in Val d’Avaray and exchanges between the groundwater and surface flow are modeled. A tridimensional finite elements model of groundwater flow is coupled with a bidimensional finite elements surface flow model. Special attention is paid to the validation of the coupling on analytical benchmarks and to the choice of the time steps used for the two models.
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References
[ABB 86] ABBOTT M. B., BATHURST J. C., CUNGE J. A., O’CONNELL P. E., RASMUSSEN
J., « An introduction to the european hydrological system- système hydrologique européen
SHE 1) History and philosophy of a physically-based, distributed modelling system
Structure of a physically-based, distributed modelling system », J. Hydrology, vol. 87,
, p. 45-77.
[BEA 79] BEAR J., Hydraulics of groundwater, Mc Graw-Hill ed., 1979.
[BIR 95] BIRKHEAD A. L., JAMES C. S., OLBRICH B. W., « Monitoring the bank storage dynamics
component of the riparian water balance in the Sabie river, Kruger National Park »,
Water SA, vol. 21, n
