Recharge Well

Rainwater harvesting is the technique of collection and storage of rain water at surface or in sub-surface aquifers, before it is lost as surface run-off. The augmented resource can be harvested in the time of need. Artificial recharge to ground water is a process by which the ground water reservoir is augmented at rate exceeding that under natural conditions of replenishment

ADVANTAGES

  • Cost of recharge to sub-surface reservoir is lower than surface reservoirs.
  • The aquifer serves as distribution system also.
  • No land is wasted for storage purpose and no population displacement is involved.
  • Ground water is not directly exposed to evaporation and pollution.
  • Storing water underground is environment friendly.
  • It increases the productivity of aquifer.
  • It reduces flood hazards.
  • Effects rise in ground water levels.
  • Mitigates the effects of drought.
  • Reduces soil erosion.

DESIGN CONSIDERATIONS:

The important aspects to be looked into for designing a rainwater harvesting system to augment ground water resources are:

  • Hydrogeology of the area including nature and extent of aquifer, soil cover, topography, depth to water level and chemical quality of ground water.
  • The availability of source water, one of the prime requisites for ground water recharge, basically assessed in terms of non-committed surplus monsoon runoff.
  • Area contributing run off like area available, land use pattern, industrial, residential, green belt, paved areas, roof top area etc.
  • Hydrometeorological characters like rainfall duration, general pattern and intensity of rainfall

WE HAVE WIDE RANGE OF DIFFERENT TECHNIQUES FOR RAINWATER HARVESTING:

  1. ROOF TOP RAINWATER HARVESTING THROUGH RECHARGE PIT
  2. ROOF TOP RAINWATER HARVESTING THROUGH RECHARGE TRENCH
  3. ROOF TOP RAINWATER HARVESTING THROUGH EXISTING TUBEWELLS
  4. ROOF TOP RAINWATER HARVESTING THROUGH TRENCH WITH RECHARGE WELL
  5. RAINWATER HARVESTING THROUGH PERCOLATION TANK
  6. RAINWATER HARVESTING THROUGH GABION STRUCTURE
  7. RAINWATER HARVESTING THROUGH GULLY PLUG
  8. RAINWATER HARVESTING THROUGH CONTOUR BUND
  9. RAINWATER HARVESTING THROUGH CHECK DAMS / CEMENT PLUGS / NALA BUNDS
  10. RAINWATER HARVESTING THROUGH RECHARGE SHAFT
  11. RAINWATER HARVESTING THROUGH DUGWELL RECHARGE
  12. GROUND WATER DAMS OR SUB-SURFACE DYKES