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”