The Indian Institute of Technology (IIT) Madras has submitted a proposal to the government for the implementation of groundwater recharge technology for flood and drought mitigation near Ayankulam village in the Ayanvilai taluk of Tamil Nadu's Tirunelveli district, the institute announced on Friday.
A team led by Dr Venkatraman Srinivasan, assistant professor, Department of Civil Engineering, IIT, visited the site in December to investigate an open agricultural well near the village that the locals claimed was recharged with an estimated 1,500-2,500 litres of water every second for several weeks without overflowing, according to the locals. The replenished water came from an adjacent minor irrigation tank overflowing due to heavy monsoon rainfall in November and December 2021.
The team also looked at the possibility of using this well, as well as others in the area, as a quick aquifer recharge during floods for storage and drawing during the dry summer months.
It recommended implementing a rapid recharge technology, which, once developed, can help mitigate floods and droughts, create a subsurface dam for water storage without evaporation loss, automatically and equitably distribute water throughout the region, filter and clean water when managed properly, and prevent and reverse saltwater intrusion in coastal aquifers.