The soil mass, in the field, consists of several layers of soil deposited one above the other. Each layer may have different coefficients of permeability. The average of permeability of the entire soil deposit depends on the direction of flow with respect to bedding planes. Transported soils usually exist in several layers, each layer with different permeability. For a three-layered [...]
The following article will guide you about how to determine the permeability of soil. Constant Head Permeability Test: Permeability of coarse-grained soils having high permeability is determined in the laboratory by the constant head permeability test. The principle of the test is to measure the volume of water flowing through a soil specimen in a given time and determine the [...]
The various types of in situ tests commonly used to determine the permeability of aquifers in the field are: 1. Pumping-out test. 2. Pumping-in Test. Compared with laboratory methods, field methods give a more reliable value of permeability, since the soil is tested in situ without disturbing its structure and void ratio. The value of permeability thus obtained is an [...]