State any two causes of landslides
Causes of Landslides:
a) Increase in the water content of the soil
b) Improper drainage system
c) Increase in the weight due to accumulation of snow and external loads due to traffic
d) Undermining caused by erosion or extraction
e) Vibration and shocks caused by blasting or earthquakes
f) Hair cracking due to alternate swelling and shrinkage of the soil mass
g) Formation of faults in bedding planes of strata due to vibrations.
h) Due to seepage pressure of percolating ground water
i) Due to failure of breast wall