Very Short Question and Answers - Rainwater Harvesting

It is the process of collecting and storing rainwater for later use, instead of letting it run off.

To recharge groundwater, store water for domestic and agricultural needs, and reduce dependence on external water sources.

It means capturing rain at the point it falls—on roofs, courtyards, or fields—so it can be stored or used to recharge groundwater locally.

It can be directed to storage tanks for immediate use or to recharge pits/borewells to replenish groundwater.

It is collecting runoff from roads, parks, or open fields into structures such as check dams and percolation ponds.

They are structures that allow water to seep into deep aquifers, helping prevent declining groundwater levels.

Kunds (underground tanks) and tankas (circular covered tanks).

Kulhs are small channels used in Himachal Pradesh and Jammu to divert water from streams.

Bhandaras (small check dams) and tals (ponds).

Eris are traditional tank systems in Tamil Nadu used for irrigation and groundwater recharge.

Virdas are shallow wells in coastal areas that collect rainwater and help prevent saltwater intrusion.

Bamboo pipes carry water over hilly terrain, providing drip irrigation with minimal water loss and reduced soil erosion.

Johads are small earthen check dams; Rajendra Singh led their revival in Alwar, recharging groundwater and reviving rivers.

Tamil Nadu made rooftop rainwater harvesting mandatory; groundwater levels rose significantly, benefiting cities like Chennai.

Rainfall is unevenly distributed seasonally; bamboo drip irrigation is used to manage water efficiently in hilly areas.

By capturing runoff in tanks, ponds, and check dams, it slows water flow, reducing flash floods and soil erosion.

Water directed to recharge pits and wells percolates into aquifers, replenishing groundwater for agriculture and drinking.

Local participation ensures better understanding of needs, improved maintenance and ownership, sustainability, and less dependence on costly large projects.

The Haryali Program involves local bodies in building water-harvesting structures, strengthening community-based water management.

It reduces dependence on municipal supply and saves costs, while providing stored water for domestic and agricultural use.