MUDFLOWS or lahars

Mode of action: abrasion, erosion, impact of carted materials, wrenching, transport, burial, filling, pressure

Distance: (average) ~ 10 km
Température : 0 à < 100 °C
Vitesse : (average) 3-10 m/s

Strong damage of human infrastructures and vegetation, rupture of  networks (in particular destruction of the bridges), topographic modifications of the valleys by filling or erosion.

On humans: death or serious injuries