The analytical solution of 1-D harmonic response in saturated soil
derived in the companion paper[1]
is used in the research of individual contributions of two compression waves
wave velocity and the applicable scale of u-p formulation in saturated soil. Mathematical imprecision is override in the research of individual contributions of two compression waves. The influence of each parameter on the velocity of three volumetric waves is studied. The applicable scale of u-p formulation is quantitatively presented by comparison of the results of u-w and u-p formulation.