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In the Bawana the first sand formation exists upto a depth
of 12m below ground level (bgl), which is followed by layer of Kankar
and silt which exists upto a depth of 16m bgl, which is followed by
impermeable layer of clay and kankar from 16 to 20m below ground level.This
clay layer is followed by layer of Kankar and silt upto 50m depth.
A comparative
study of water level map of 1960 and 2002 shows in Bawana the water
level which was at 2 to 5m below ground level has gone down to 5 to
10 mts bgl.
In
Bawana the occurrence of fresh water in alluvium formation is upto
a depth of 30m to 60m. Below that level saline or brackish water occurs.
The amount of fresh water is decreasing due to extraction.
| IV.RECOMMENDATION FOR AUGMENTATION
OF GROUNDWATER |
The
intake capacity of recharge structures will be low in shallow water
table condition. Hence in Bawana where the ground water level is below
10m rainwater harvesting can be taken up.
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