But

  • Soil parameters, C, ɸ, T are uncertain and spatially variable.
  • Recharge parameter R is spatially and temporally variable.

Assume Uniform Probability Distributions

graph
C ~ U (C1, C2)
R/T ~ U(x1, x2)
tanɸ ~ U(t1, t2)

Define Stability Index

SI = Prob(FS > 1)

Slide 6 of 14