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Which one of the following methods is not suitable for urban rainwater

June 1, 2025 by rawan239

Which one of the following methods is not suitable for urban rainwater harvesting?

Rooftop recharge pit

Recharge wells

Gully plug

Recharge trench

This question was previously asked in

UPSC CDS-1 – 2019

Download PDF Attempt Online

Rainwater harvesting methods suitable for urban areas typically involve collecting rainwater from rooftops or paved surfaces and either storing it or using it to recharge groundwater. Rooftop recharge pits, recharge wells, and recharge trenches are all methods designed for these urban environments. A gully plug, however, is a small structure built across a gully (a small valley or erosion channel) to prevent soil erosion and promote infiltration. These are typically used in rural or semi-arid areas with natural terrain and gullies, not in developed urban settings with managed drainage systems.

– Urban rainwater harvesting focuses on collecting runoff from buildings and paved areas.
– Rooftop recharge pits, recharge wells, and recharge trenches are common urban techniques for collection and groundwater recharge.
– Gully plugs are erosion control structures used in natural or agricultural landscapes.

Urban areas have unique challenges for rainwater harvesting, such as limited open space, high population density, and existing infrastructure like storm drains. Methods must be adaptable to these conditions. Gully plugs are designed for managing surface runoff in unpaved environments to control erosion, which is not the primary goal or suitable application in most urban areas.

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