Question

What is the role of recharge pits in recharging groundwater?

Answer 1

1. Bypassing Impermeable Layers: Pits are excavated to pierce through hard, non-porous topsoil (such as clay) and reach the permeable, water-bearing strata underneath them.
2. Direct Infiltration: They collect filtered rooftop rainwater or surface runoff, which pools and flows directly into the deeper aquifer.
3. Natural Filtration: Pits are usually 1 to 2 meters wide and filled with pebbles, gravel, and coarse sand. This material naturally filters out silt, keeping the pit from clogging over time.