factors affecting permeability of soil in geotechnical engineering formula pdf / ppt

 

Permeability Of the soil

 

Permeability is a property of a material which permits the passage or seepage of water through its inter connecting voids.

 

     Factors effecting permeability of soil

 

Soil permeability is affected by many factors, including the size and composition of the soil particles, the amount of water in the soil, and the presence of impurities.

 

  Soil particle properties

 

1.         Particle size

The size of the soil particles affects how easily water can flow through the soil.

 

2.         Particle shape

 

The shape of the soil particles affects how easily water can flow through the soil.

 

3.         Particle structure

The structure of the soil particles affects how easily water can flow through the soil.

 

Water in the soil

 

1.         Void ratio

The volume of voids in the soil affects how much space is available for water movement.

 

2.         Degree of saturation

 

The amount of water filling the voids affects how readily additional water can pass through.

 

3.         Adsorbed water

 

Water that is strongly attached to the soil solids reduces flow area available for passage of water.

 

Impurities in the soil

 

1.         Impurities in the water

 

Impurities in the water can block the flow path, reducing the permeability of the soil.

 

2.         Organic material

 

Organic material in the soil can block the flow path, reducing the permeability of the soil