Collecting and storing rainwater for use.

• A. Groundwater Recharge
• B. Desalination
• C. Rainwater Harvesting
• D. Water Recycling

Answer: (C)

Collecting and storing rainwater for use is rainwater harvesting. It works by capturing precipitation from a catchment surface like a roof, guiding it through gutters into a storage tank, and then using that water for purposes such as irrigation or household needs, sometimes after treatment. This approach reduces reliance on treated municipal or groundwater supplies and provides a buffer during dry periods. A typical setup involves the catchment area, conveyance with filtration or first-flush devices, a storage tank, and a distribution system. It differs from groundwater recharge, which aims to infiltrate water to replenish aquifers; desalination, which removes salt from seawater; and water recycling, which treats wastewater for reuse.