30th November 2023. Several catchments in northern France have seen flood peaks exceed the previous record multiple times in a single month. As an example, the Laine River, near Boulogne, exceeded the previous 2012 peak 4 times in November (Record back to 1970). The new maximum discharge of 68m3/s is 20% greater than the 2012 value. The catchment is about 250km2. The associated rain gauge at Wirwignes (62896001, record back to 1988) achieved new records for every duration examined from 1-14 days during November. According to Meteo France, such rain accumulations have only been seen once before in the Pas De Calais. The ongoing disaster meant response plans required revision given the lengthy impact on utilities and services, even for those not directly flooded. €50 Million has been allocated to assist by the French Government, and €11.6 million provided by the EU. The French Public reinsurer estimates the cost of the floods to be €640 Million.
30 November 2023
French Floods Re-write Response Plans