Groundwater occurs in semi-confined to confined conditions in the porous alluvial formations.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/groundwater-recharge-and-soil-types
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/new-indian-express-chennai
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/groundwater-recharge
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/chennai-t
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lakes
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rainfall