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 Form 3 Online Geography Lessons on Underground Water

In this lesson we are going to define what a water table is and discuss on the different zones it has

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Answer Text:
Water Table
1.PNG
- Water that infiltrates and percolates into the ground fills air spaces creating zones of saturation whose upper levels are called water tables.
Zones of Saturation
a) Zone of Non-saturation
- Zone of permeable through which water passes but doesn’t remain in the pores for a long time.
- Well sunk to this zone doesn’t contain any water.
b) Zone of Intermittent Saturation
- Zone which during the rain season the rocks are saturated with water while during the dry season they are
unsaturated.
Temporary water table - Upper level of ground water in the zone of intermittent saturation.
- Zone of non-saturation and that of intermittent saturation are called vadose zone.
c) Zone Of Permanent Saturation
- Zone where pores spaces are permanently filled with water.
Permanent water table - Upper level of ground water in the zone of permanent saturation.
Presence of ground water leads to formation of springs, wells boreholes and artesian basins.


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