Table 6: Suggested ranges of COVs in the literature [39-42].

Property or In-Situ Test Results COV Source
Unit Weight (γ) 5-10 Uzielli et al.
Friction Angle (ϕ) 7-12 Harr
Cohesion (c) 20-50 Harr
Elastic module (E) 2-42 Phoon et al.
Standard Penetration Test (N) 10-45 Phoon et al.
Correlation length (0) 0-20 Huber