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What is the main source of groundwater recharge ?
Snowmelt
Ocean currents
River water
Rainwater infiltration
None of the above
Rainwater infiltration
Rainwater infiltration is the primary mechanism of groundwater recharge, where precipitation permeates through the soil profile into aquifers. This process replenishes the water table and is critical for maintaining long-term sustainable water availability in geological formations.
Rainwater infiltration is the primary mechanism of groundwater recharge, where precipitation permeates through the soil profile into aquifers. This process replenishes the water table and is critical for maintaining long-term sustainable water availability in geological formations.
The Water Cycle (Hydrological Cycle) refers to the continuous movement of water on, above, and below the surface of the Earth, driven primarily by solar energy and gravity.
Infiltration rate depends on soil porosity and permeability.
Aquifers are underground layers of water-bearing permeable rock, gravel, sand, or silt.
Artificial recharge techniques like rainwater harvesting are used to counter declining groundwater levels.
Snowmelt provides seasonal recharge in specific regions like the Himalayas but is not the primary global source.
Ocean currents are saltwater masses and do not contribute to freshwater groundwater recharge.
River water acts as a local source of recharge through riverbed infiltration, but rainfall remains the dominant regional driver.
The process of water moving from the soil surface into the soil matrix is technically termed 'Infiltration', while 'Percolation' refers to its deeper movement into groundwater.
D is correct тАФ Rainwater infiltration is the fundamental process by which surface water replenishes subterranean aquifers worldwide.
Link this concept with the 'Atal Bhujal Yojana', a Government of India scheme aimed at strengthening the institutional framework for sustainable groundwater management through community participation.
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