Scales
qCharacteristic
length scales (mm to km)
qe.g
for Mount St. Helens (mudflow –1985)
vRunout distance » 31,000 m
vDescent height » 2,150 m
vFlow length(L) » 100-2,000
vFlow thickness(H) » 1-10 m
vMean diameter of
sediment material 10-3-10 m
qScale:
ε═H/L – several terms small and are dropped
(data from Iverson 1995, Iverson & Denlinger 2001)