“In his book on Delhi’s stepwells, heritage activist Vikramjit Singh Rooprai has written about India’s depleting water tables and the potential use of stepwells in reversing the scarcity cycle. Experts stress the need to revive stepwells as aquifers instead of building newer (and untested) methods of water storage and management. The World Monuments Fund . . . has called it a long-term sustainable water management method.”
https://reasonstobecheerful.world/reviving-indias-stepwells-water-scarcity/