This typical Mediterranean urban catchment is well-known for its flash floods phenomena. These floods can directly submerge part of the historical city and could potentially induce severe direct and indirect damage.

Today, the city of Nice and indeed all cities of the French Riviera are facing new urban growth mainly located in the upstream parts of the urban catchments. This new situation contributes to increase the runoff which is not fully intercepted by the storm-water network.

Every year, the storm-water network demonstrates growing insufficient capacities and generates new urban flooding processes.

The high intensities recorded in Nice contribute to make Nice a representative case that is not only relevant for the European and Mediterranean environment but also for the regions associated with extreme rainfall intensities.  

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