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Examoogle • User • info@examoogle.com • EE-2024-8821
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Why should people implement rainwater harvesting?
In order to play with the water
In order to use during scarcity of water
In order to pour the rain water directly to the sewage
In order to time pass
In order to use during scarcity of water
Rainwater harvesting is the systematic collection and storage of rainwater for future use, rather than allowing it to run off as waste. It serves as a sustainable practice to augment water supply during periods of scarcity and replenish depleting groundwater levels.
Rainwater harvesting is the systematic collection and storage of rainwater for future use, rather than allowing it to run off as waste. It serves as a sustainable practice to augment water supply during periods of scarcity and replenish depleting groundwater levels.
V=R×A×Cr — where V is volume of water, R is rainfall intensity, A is catchment area, and Cr is runoff coefficient
The principle involves capturing precipitation from rooftop surfaces or land catchments via gutters or channels. This water is filtered to remove debris and sediments before being diverted into storage tanks (for direct use) or recharge pits (for groundwater infiltration).
Reduces the load on municipal water supply systems.
Mitigates urban flooding by reducing peak runoff rates.
Improves groundwater quality by diluting pollutants.
Essential in regions with seasonal rainfall patterns.
Lower water bills and reduced dependence on external sources.
Eco-friendly and contributes to groundwater table recharge.
High initial cost for system installation.
Requires regular maintenance and cleaning of filtration systems.
Agricultural irrigation
Groundwater recharge
Domestic consumption (non-potable uses)
Livestock management
In India, many states have made rainwater harvesting mandatory for new buildings to combat severe groundwater depletion.
Option A, C, and D are incorrect as they do not serve any engineering or environmental utility regarding water resource management.
B is correct — Rainwater harvesting is implemented to store water during periods of surplus rainfall so that it remains available for use during times of water scarcity.
In competitive exams, always link 'Rainwater Harvesting' with 'Groundwater Recharge' and 'Sustainability' to identify the correct engineering purpose.