Example 2: Specific Mathematical Descriptor 



if 



F > LO, t = Tsig(Lsig) 

 LO < F < RO, t = 10(Tsig) 

 F < RO, t = Tsig(Rsig) 



where 



F = soil flow 

 LO = 8.888 + 0.0017036(S) 

 RO = 8.404 + 0. 00048076 (S) 



S = soil stability 



2.2 



Lsig = 10 e 



(LO ♦ 20 - F) 

 20 



- 1 



0.23 



Tsig = 1 - e 



(6000 - S) 

 6000 



0.185 



RO - 111 + F 



11 



- 1 



Rsig = 10 e 



Limits 



< F < 28 

 5 S s 5000 



0.30 



2.4 



13 



