Mass Wasting - Hydrogeology: Objectives, Methods, Applications - page 268

Figure 129 1998 collapses in Mougins (Alpes-Maritimes). Piezometry of the Triassic aquifer
and karst indicators in the problematic area.
Some of these collapses are very old, but it appears that 40% of
the collapses occurred after 1960 and that a distinct resurgence in their
occurrences characterizes recent decades, and particularly, the last ten years
(12 signifi cant events from 1992 to 2001).
It must therefore be concluded that this karst mass, which had reached
a state of relative equilibrium, is now seeing renewed activity, which can
be assigned neither to a change in the natural discharge (elevation of the