ABSTRACT
Effective grain size d10, mm 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Permeability (k=Cd210) 10−4 m/s 10−3 m/s 10−2 m/s C= 0.10 (above equation) 1 4 0.9 1.6 2.5 3.6 4.9 6.4 0.8 1.0 C= 0.15 1.5 6 1.4 2.4 3.8 5.4 7.4 9.6 1.2 1.5
◦ Hazen’s formula is appropriate for coarse grained soils only (0.1 mm to 3 mm). ◦ Ideally for uniformly graded material with U < 5. ◦ Inaccurate for gap graded or stratified soils.
