Paris and suburbs have not experienced major flooding in the recent past. The last ones occurred in 1910, 1924 and 1955. However, for this time, urbanization grew on and under the floor of the flood prone area of the river Seine and Marne (buildings, houses, infrastructures, networks, etc). Nowadays, 90% of the flood plain is urbanized in the metropolis of Paris, including the City of Paris and the 3 surrounding departments: the Val de Marne, the Seine-Saint-Denis and the Hauts de Seine.
As a consequence, a major flood would cause many losses today in this area, about 12 billion euro’s (except networks), 1 million inhabitants and 170.000 companies, factories and networks will be impacted for several months.
The current flood risk management system of the Seine catchments is based, primarily on forecasting and secondly on work out actions of four reservoir-dams located upstream Paris metropolis and dikes located along Seine and Marne rivers in urbanized areas of metropolis. But this system cannot be sheltered from major flood all urbanized areas in flood plain. Some residual risk bear upon urbanized areas in flood plains. Main actions now due in Ile de France are to decrease this residual risk.
As a consequence, a major flood would cause many losses today in this area, about 12 billion euro’s (except networks), 1 million inhabitants and 170.000 companies, factories and networks will be impacted for several months.
The current flood risk management system of the Seine catchments is based, primarily on forecasting and secondly on work out actions of four reservoir-dams located upstream Paris metropolis and dikes located along Seine and Marne rivers in urbanized areas of metropolis. But this system cannot be sheltered from major flood all urbanized areas in flood plain. Some residual risk bear upon urbanized areas in flood plains. Main actions now due in Ile de France are to decrease this residual risk.
