The property of soil which permits the flow
of water through the inter connecting voids is called permeability.
The Value of permeability rate is important in water conveyance and water retention structures the continuous movement of water through the soil pores of a structure results in the removal of soil particles the removal of soil particles of soil particles result in the formation of piping which will affect the stability of the structure. knowledge of permeability is important for the following engineering problems:-
2. Losses
from irrigation canals.
3. Seepage
through dams and levees.
4. spacing and depth of under drains for lowering the water table under a road or runway in order to improve sub-grade stability.
5. Draining water -logged agricultural land.
6. Rate
of settlement of structures.
Soils having good permeability rate
are suitable for the following engineering problems:-
I.
Pervious
shells of dikes and dams .
II.
Road
and rail embankments .
III.
Sub-grades
for roads .
Soils having low permeability
are suitable the following problems:-
I.
Canal
beds .
II. Imprevious portions of earthen dams.
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