7. 7
• Artificial grounwater
recharge.
•A recharging pit allow the
rainwater to replinsh
groundwater by recharging
the underground aquifier’s.
•To increase infiltration.
Borewell recharge
8. 8
Introduction
Scientific method of borewell recharge
technique was first intiated by Zillah
Panchayath of Chikkamagalur Dist. in
Karnataka.
Sankalpa Rural Development of Society by
Sikandar in Hubli (2008), was promoting
rainwater harvesting techniqe through direct
borewell recharge.
Cost of recharging each borewell through
rainwater techniqe is 20,000 to 30,000 Rs.
9. Materials used Thickness of
the layer(cm)
Diameter of
materials(cm)
Boulders 30 30-40
Large stones 30 15-20
Small stones 90 7.5
Gravel 90 2-4
Wood charcoal 30
Sand 30 0.2
Nylon net 50-70% permeable
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10. Runoff water from the cultivated area enter into
primary filter unit.
Secondary filter unit consists of dug out of the
soil around the borewell Casing pipe by 2.5m
depth.
From the bottom ,up to 50cm height, small holes
(4-6mm) are made on the pipe with pointer and
pipe is covered with mesh.
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11. 4layers of stones are filled
1st layer-Boulders(30-40cm)
2nd layer-Large stones(15-20cm)
3rd layer-small stones(7.5cm)
4th layer-gravel(2-4cm)
Nylon net is covered
Fill the pit with Wood Charcoal and Sand.
Protection wall is built.
11
13. Where groundwater level are declining due to over
exploitation.
Water from the borewells slow down after some
water has been drawn.
Feed the selected borewell with 4000lts of water.
Fill to the top
Observe for 10-15mins for fall in water level
Continuing feeding.
13
14. case I case II
If the borewell overflows, If the borewell is
it is not suitable. absorbs,it is
suitable.
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27. Local materials are used for filters
Improves the water quality
Quick recharge
Evaporational loss is minimized
Cost effective
Eco friendly.
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29. The ground water recharge in treated borewell
was found to be 23.8% of annual rainfall against
5.56% in untreated borewells .
Effeciency of the designed filters was found to be
93% to 96%
Maximum infiltration efficiency was absorved in
recharged borewells .
Borewell recharge techniques adopted in
Karnataka ,Maharashtra, Andra pradesh.
29
30. Studies on Borewell Recharge NICRA
Concepts and application in agricultural
engineering. Nilkunja Bihari Dash
Internet sources.
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