nicolas-gérard camphuis majors and cities preventing and managing flood risks
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Nicolas-Gérard CAMPHUIS
Majors and cities preventing and managing flood risks
5 m
5 miles bright flood plainOrleans70.000
Orleans70.000
Tours120.000
3 miles bright flood plain
Paris
Tours
Orléans
L = 650 mS = 120.000 km²
Q in Orléans(35.000 km²)
Q 1 = 300 m3/sQ 10 = 3.000 m3/sQ 100 = 6.000 m3/sQ 500 = 8.000 m3/s
NYC
33 x
250 m150 m
300.000 190.000 14.000
3 floods184618561866100 %flooded
L = 250 mS = 600 mxm
160 breaches for each flood
1
1
Sand and limonStone as protectionEarth covering
Old dike 600 y old
Top protection erected in 1847
On the river side
Old dike or levee
Reinforcement realized in 19702
1
Drainage under the levee
Path
On the valley side
PREDICTION & adequate alert
3P strategy decided in 1999
PREVENTION & crisis management
PROTECTION
600 M. $ needed in 15 to 20 years
40 M $ spent on 2000-2006
Diagnosis of the vulnerability of companies and public networks :power plants and supplywater and sanitationroads and railways
with 80 % subventionfrom the “federal” and “state”