The

coefficient of permeability, k, is one of the most important parameters for studying nonlinear properties of soil, and a linear correlation between the void ratio e and lg k is valid for the most common clays [20], which can be expressed as follows:

The measurement method enables calculating the

coefficient of permeability [k.

The coefficient of permeability was calculated by using the following formula:

where k is coefficient of permeability, m/s, Q is rate of discharge, cumecs, L is dimension of the specimen measured in the direction of flow, A is area of cross section of the specimen, and H is water head causing flow measured, m.

This study determined the level of coefficient of permeability and transmmissivity including aquifer thickness as well as storativity of the aquifer in the rock of Rivers State.

Since the coefficient of permeability are similar to the transmmissivity.

W] is the

coefficient of permeability for water under saturated conditions and [k.

Totally, 144 cylindrical PFC specimens that constituted 12 replicate specimens for the 12 experimental mixes (Table 2) were prepared to evaluate the volumetric properties,

coefficient of permeability (K), aged abrasion loss (AAL) and moisture susceptibility.

The

coefficient of permeability of the specimen k is computed from Equation 3.

Densification by RGP causes increase in deformation moduli and decrease in the

coefficient of permeability and coefficient of volume change.

5z z: depth below the ground level

Coefficient of permeability [10.

where h is the GWL, k is the

coefficient of permeability of the permeable soil layer, [z.