K.Lakshmi
They will prevent surplus water draining into sea
Water Resources Department officials inspect one of the recharge structures being built at the Thiruninravur tank.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/artificial-recharge-structures-being-constructed-thiruninravur-tank
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-chennai
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[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/tamil-nadu
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/thiruvallur-d