1. 1988 flood in Nîmes (France)
André PAQUIER

2. Description of the event
October 3, 1988, heavy storm: 300 mm, 3 hours (T > 100 years)
Flow crosses town from hills (slope > 1 %)
Water up to 3 m in streets
Railway embankment blocked flow, cars away, walls down
Damages (500 millions €) and 10 casualties

3. Locality selected

4. Model used 2-D shallow water equations
Explicit MUSCL type finite volume scheme (Rubar 20)
A network of streets :11(7,5,4)-point street cross section
Missing: detailed topography of the crossings, storage (parks, cellars…), infiltration(soil, sewage), internal inputs (rain, sewage)
Hydrodynamic parameters: bottom friction, turbulence, waves

5. Computed maximum water depths

6. Water depths (centre South)