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:
- ROOF TOP RAINWATER HARVESTING THROUGH RECHARGE PIT
- ROOF TOP RAINWATER HARVESTING THROUGH RECHARGE TRENCH
- ROOF TOP RAINWATER HARVESTING THROUGH EXISTING TUBEWELLS
- ROOF TOP RAINWATER HARVESTING THROUGH TRENCH WITH RECHARGE WELL
- RAINWATER HARVESTING THROUGH PERCOLATION TANK
- RAINWATER HARVESTING THROUGH GABION STRUCTURE
- RAINWATER HARVESTING THROUGH GULLY PLUG
- RAINWATER HARVESTING THROUGH CONTOUR BUND
- RAINWATER HARVESTING THROUGH CHECK DAMS / CEMENT PLUGS / NALA BUNDS
- RAINWATER HARVESTING THROUGH RECHARGE SHAFT
- RAINWATER HARVESTING THROUGH DUGWELL RECHARGE
- GROUND WATER DAMS OR SUB-SURFACE DYKES
