Artificial recharge and Rain
water harvesting –Case studies in
Kerala
A.Subburaj,Scientist-D
Central Ground Water Board
Ke...
Major causes for scarcity
• Rainfall pattern
• Geomorphological set up
• Drainage
• Sand mining
• Hydro geological factors...
Definition
• Augmentation of ground water reservoir by man
made structures by using rain water.
• Rain Water Harvesting is...
Methods of Artificial Recharge
a.Direct surface techniques
. Flooding
. Basins or percolation tanks
. Stream augmentation
...
Rain water Harvesting
a.Storage of rain water on surface for future
use
b.Recharge to ground water
- Pits
- Trenches
- Dug...
Benifits
• An ideal solution to water problems in areas having
inadequate water resources
• The ground water level will ri...
Cost
S.No Recharge structure Approximate cost
(in Rs)
1 Recharge pit 2500-5000
2 Recharge trench 5000-10000
3 Recharge thr...
Case studies
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
Ar rw harvesting
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  • vallikavu
  • Chech dam
  • Check dam
  • Subsurface duke
  • Recharge pond
  • Ar rw harvesting

    1. 1. Artificial recharge and Rain water harvesting –Case studies in Kerala A.Subburaj,Scientist-D Central Ground Water Board Kerala Region,Trivandrum
    2. 2. Major causes for scarcity • Rainfall pattern • Geomorphological set up • Drainage • Sand mining • Hydro geological factors • Over exploitation • Reclamation of land for settlement
    3. 3. Definition • Augmentation of ground water reservoir by man made structures by using rain water. • Rain Water Harvesting is deliberate collection and storage of rain water
    4. 4. Methods of Artificial Recharge a.Direct surface techniques . Flooding . Basins or percolation tanks . Stream augmentation . Ditch and furrow system . Over irrigation b.Direct subsurface techniques . Injection wells or Recharge wells . Recharge pits and shafts . Dug well recharge . Bore hole flooding . Natural openings,cavity filling c.Combination of Surface-Subsurface techniques . Basin or percolation tanks with pit shaft or wells d. Indirect Techniques . Induced recharge from surface water source .Aquifer modification
    5. 5. Rain water Harvesting a.Storage of rain water on surface for future use b.Recharge to ground water - Pits - Trenches - Dug wells - Hand pumps - Recharge wells - Recharge shafts - Lateral shafts with bore wells - Spreading techniques
    6. 6. Benifits • An ideal solution to water problems in areas having inadequate water resources • The ground water level will rise • Mitigates the effects of drought & achieves drought proofings • Reduces the runoff which chokes the storm water drains • Flooding of roads and low land areas are reduces • Quality of water improves • Soil erosion will be reduced • Saving of energy per well for lifting of ground water-a one meter rise in water level saves about 0.40 KWH of electricity.
    7. 7. Cost S.No Recharge structure Approximate cost (in Rs) 1 Recharge pit 2500-5000 2 Recharge trench 5000-10000 3 Recharge through hand pump 1500-2500 4 Recharge through dug well 5000-8000 5 Recharge well 50000-80000
    8. 8. Case studies

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