High Resolution 1:10,000 scale Mapping Strategy of Multi ... - NDMA

It also does not account for the impact of adjacent factors like upslope development
or down slope modifications of the hill slope or accentuating factors such as ground
vibrations or acceleration due to earthquakes.
Symbol Definition Units Value Range
C cohesion kN/m2 0-250
γ unit weight of slope material kN/m3 12-22
γw unit weight of water kN/m3 9.8
Z thickness of slope material
above the slide plane
Zw thickness of saturated slope
material above the
slide plane
m vertical height of water table
above the slide plane,
expressed as a fraction of
total thickness
β slope of the ground surface
which is assumed parallel to
the slope of the failure plane
m 1-20
m 0-20
dimensionless
degrees
φ internal angle of friction degrees
S shear strength
0-1
1-40
22-46
43