A 1-in-100 flood is a probability, not a calendar. On the Port-Aven quay, the same water level now comes back about every twelve years.

A defence is only finished when someone keeps measuring it. What ten years of readings give a city that a handover report cannot.

Framework agreement, open tender or monitoring-only lot: the three ways public buyers work with us, and what every contract carries.

On the Haut-Lône pilot farms, we pour water into a ring of soil and time it. Plots with grassed strips now take in 38 mm/h more.

146 timber dams across the Haut-Lône headwaters each hold back a flood for a short time. Together, they delay the peak by 3 h 40 min.