Groundwater is the most commonly used source of irrigation in India, especially through tube wells and bore wells.
Canals carry water diverted from rivers or released from reservoirs to agricultural fields.
Groundwater wells can supply water even when surface sources are unavailable during dry seasons.
Tank irrigation is common in the Deccan Plateau where small tanks collect and store monsoon water.
Atmospheric humidity is not a usable source of irrigation water.
Rainwater harvesting collects and stores rainwater for later use in irrigation or domestic needs.
Glacier-fed rivers like the Ganga are perennial and flow throughout the year.
Groundwater is often the only reliable source in dry regions lacking surface water.
Excessive withdrawal of groundwater can lead to aquifer depletion and falling water tables.
Canals are artificial channels constructed to convey water for irrigation from rivers or reservoirs.